Flashcards
The neck - Anatomy

Cards in this deck (144)
- 1What is the anterior triangle?The region located at the front of the neck
- 2What are the borders of the anterior triangle?Superior: inferior border of the mandible
Laterally: anterior border of the sternocleidomastoid
Medially: Sagittal line down the midline of the neck - 3What covers the roof and the floor of the triangle?Investing fascia covers the roof
Visceral fascia covers the floor - 4What are the labels?Mandible
Midline of neck
Anterior triangle
Sternocleidomastoid
- 5How are the muscles in this part of the neck divided?Suprahyoid muscles and are superior to the hyoid bone
Infrahyoid muscles that are inferior to the hyoid bone - 6What happens to the common carotid artery in the anterior triangle?It bifurcates into the external and internal carotid branches
The internal jugular vein can also be found in this area which is responsible for the drainage of the head and neck - 7Which cranial nerves are in the anterior triangle?Facial VII
Glossopharyngeal IX
Vagus X
Accessory XI
Hypoglossal XII - 8Yellow? Blue? Red?Yellow: Hypoglossal nerve
Blue: Genioglossus
Red: Common carotid bringing into internal and external carotid
- 9What is the genioglossus?A fan shaped extrinsic tongue muscle that forms the majority of the body of the tongue
It arises from the mental spine of the mandible and its insertions are the hyoid bone and the bottom of the tongue - 10What muscle is this? Describe itPlatysma muscle
Connected directly to the skin
Two heads which originate from the fascia of the pectoralis major and deltoid
The platysma inserts into the inferior border of the mandible
Innervation is via the facial nerve VII
- 11What are the borders of the carotid triangle?Superior: posterior belly of the digastric muscle
Lateral: medial border of the sternocleidomastoid muscle
Inferior: superior belly of the omohyoid muscle - 12What area is this? What are the labels?CAROTID TRIANGLE
Left
Hyoid bone
Carotid triangle
Omohyoid
Right
Stylohyoid
Diagastric
Sternocleidomastoid
- 13What is the submental triangle?It is in the neck situated underneath the chin
Contains the submental lymph nodes which filter lymph draining from floor of the mouth and parts of the tongue - 14How is the submental triangle divided?Inferiorly: The hyoid bone
Medially: The midline of the neck
Laterally: anterior belly of the digastric - 15What forms the base of the submental triangle?Mylohyoid muscle which runs from mandible to the hyoid bone
- 16What area is this? What are the labels?Submental triangle
Left
1. Midline of neck
2. submental triangle
3. Hyoid bone
Right
1. Digastric
2. Mylohyoid
- 17What area is this? What are the labels?MUSCULAR TRIANGLE
Left
1. Midline of the neck
Muscular triangle
Right
1. Hyoid
2. Omohyoid
3. Sternocleidomastoid
- 18Green? Blue? Yellow? Light purple? Dark purple? Red?Green: Sternocleidomastoid
Blue: Splenius capitis
Yellow: Levator scapulae
Light purple: Anterior scalene
Dark purple: Middle scalene
Red: Trapezius
- 19What forms the external jugular vein? Whee does it empty into?Formed by the retromandibular and posterior auricular veins
After crossing the SCM it empties into the subclavian vein - 20Which nerve innervates the sternocleidomastoid?The cranial accessory nerve XI and it lies superficially in the posterior triangle
- 21What veins lie In the posterior triangle?External jugular
Transverse cervical
Suprascapular - 22What is one of the major branches of the cervical plexus?The phrenic nerve
- 23How does the omohyoid muscle split?The large superior part is termed the occupital triangle
The inferior triangle is known as the subclavian triangle and contains the distal portion of the subclavian artery - 24What is the pharynx?It is a muscular tube that connects the oral and nasal cavity to the larynx and oesophagus
- 25Where does the pharynx begin and end?It begins at the base of the skull and ends at the inferior border of the cricoid cartilage (C6)
- 26What are the three parts of the pharynx?1. Nasopharynx
2. Oropharynx
3. Laryngopharynx - 27Yellow? Green? Blue?Yellow: Nasopharynx
Green: Oropharynx
Blue: Laryngopharynx
- 28Where is the nasopharynx found? Describe the nasopharynx?It is found between the base of the skull and the soft palate
It is continuous with the nasal cavity and performs a respiratory function by conditioning inspired air and propagating it into the larynx
The posterosuperior nasopharynx contains the adenoid tonsils which enlarge between 3-8 years and then regress - 29What type of epithelium lines the nasopharynx?Respiratory epithelium: ciliated pseudostratfied columnar epithelium with goblet cells
- 30Where is the oropharynx found?The oropharynx is the middle part of the pharynx located between the soft palate and the superior border of the epiglottis
- 31What structures do the oropharynx contain?- Posterior 1/3 of the tongue
- Lingual tonsils: lymphoid tissue at the base of the tongue
- Palatine tonsils: lymphoid tissue located in the tonsillar fossa (between the palatoglossal and the palatopharyngealarches of the oral cavity
- Superior constrictor muscle - 32What is Waldeyer's ring?It is the ring of lymphoid tissue in the naso- and oropharynx formed by the paired palatine tonsils, the adenoid tonsils and lingual tonsil
- 33What is the oropharynx involved in?Voluntary and involuntary phases of swallowing
- 34Where is the laryngopharynx located? Describe the laryngopharynx?It is the most distal part of the pharynx located between the superior border of the epiglottis and the inferior border of the cricoid cartilage
It is posterior to the larynx and communicates with it via the laryngeal inlet - 35What does the laryngopharynx contain?The middle and inferior pharyngeal constrictors
- 36What is this? What are the labels?The inferior pharyngeal constrictor
1. Thyropharyngeus
2. Cricopharyngeus
- 37What are the two main groups of pharyngeal muscles?Longitudinal and circular
- 38What are the pharyngeal muscles innervated by (motor) ? What is the exceptionVagus nerve
Stylopharyngeus is the exception being innervated by the glossopharyngeal nerve - 39Describe the circular muscles of the pharynx?Three circular pharyngeal constrictor muscles: superior, middle and inferior
The circular muscles contract sequentially from superior to inferior to constrict the lumen and propel the bolus of food inferiorly into the oesophagus - 40Describe the superior pharyngeal constrictor?Located in the oropharynx
- Originates from the pterygomandibular ligament, the alveolar process of the mandible and the medial pteroid plate and the pterygoid hamulus of the sphenoid bone
- Inserts posteriorly into the pharyngeal tubercle of the occupit and the median pharyngeal raphe - 41Describe the middle pharyngeal constrictor?- Located in the laryngopharnx
- Originates from the stylohyoid ligament and the horns of the hyoid bone
- Inserts posteriorly into the pharyngeal raphe - 42Describe the inferior pharyngeal constrictor?Located in the laryngopharynx and has two components:
- Superior component (thryopharyngeus) that has oblique fibres that attach to the thyroid cartilage
- Inferior component (cricopharyngeus) that has horizontal fibres that attach to the cricoid cartilage - 43What are the labels?- Superior constrictor
- Stylopharyngeus
- Middle constrictor
- Inferior constrictor
- 44What are the longitudinal muscles of the pharynx?They act to shorten and widen the pharynx and elevate larynx during swallowing
Stylopharyngeus: arises from styloid process of temporal bone and inserts into pharynx
Palatopharyngeus: arises from the hard palate of the oral cavity and inserts in to the pharynx
Salpingopharyngeus: arises from the Eustachian tube and inserts into the pharynx - 45Yellow? Green? Orange? Purple? Blue?Yellow: Stylopharyngeus (glossopharyngeal nerve)
Green: superior constrictor
Orange: Palatopharyngeus
Purple: Salingopharyngeus
Blue: Inferior constrictor
- 46What is most of the sensory and motor innervation of the pharynx achieved by and what is the exception?Pharyngeal plexus
The nasopharynx is not supplied by the pharyngeal plexus - 47What is the pharyngeal plexus formed by?Pharyngeal branches from the glossopharyngeal nerve (CN IX)
Pharyngeal brach of the vagus nerve (CN X)
Branches from the external laryngeal nerve
Sympathetic fibres from the superior cervical ganglion - 48Sensory innervation of the nasopharynx?Maxillary nerve (CN V2)
- 49Sensory innervation of oropharynx?Glossopharyngeal nerve (CN IX)
- 50Sensory innervation of laryngopharynx?Vagus nerve (CN X)
- 51What is the motor innervation of the pharynx?All muscles are innervated by the vagus nerve (CN X) apart from the stylopharyngeus which is innervated by the glossopharyngeal nerve (CV IX)
- 52What is the arterial supply of the pharynx?Via the branches of the external carotid:
1. Ascending pharyngeal artery
2. Branches of the facial artery
3. Branches of the lingual and maxillary arteries - 53How is venous drainage of the pharynx achieved?Via the pharyngeal venous plexus
- 54Describe the larynx?The voice box is an organ located in the anterior neck
It has several important functions including phonation, the cough reflex and protection of the lower respiratory tract - 55How is the larynx divided?1. Supraglottis: from the inferior surface of the epiglottis to the vestibular folds (false vocal chords)
2. Glottis: Contains the vocal chords and 1cm below them. The opening of the vocal chords is known as the rima glottidis, the size of which is altered by the muscles of phonation
3. Subglottis: From the inferior border of the glottis to the inferior border of the cricoid cartilage - 56What type of epithelium lines the larynx?Pseudostratified ciliated columnar epithelium
Except for the true vocal chords that are lined by stratified squamous epithelium - 57What is the arterial supply to the larynx?Superior laryngeal artery - a branch of the superior thyroid artery and it follows a branch of the superior laryngeal nerve to the larynx
Inferior laryngeal artery - a branch of the inferior thyroid artery and it follows the recurrent laryngeal nerve to the larynx - 58How is the venous drainage of the larynx achieved?Via the superior and inferior laryngeal veins
- 59How is the larynx innervatedReceives both motor and sensory innervation from from branches of the vagus nerve
Recurrent laryngeal
Superior laryngeal - 60Describe the recurrent laryngeal nerve?Recurrent laryngeal nerve: provides sensory innervation to the infra glottis, and motor innervation to all the internal muscles of the larynx except the cricothyroid
- 61Describe the superior laryngeal nerve?The internal branch provided sensory innervation to the supra glottis and the external branch provides motor innervation to the cricothyriod muscle
- 62What are the unpaired laryngeal cartilages?Thyroid cartilage
Cricoid cartilage
Epiglottis - 63Describe the thyroid cartilage?A large prominant structure easy to see in males
It is composed of two sheets which join together anteriorly to form the laryngeal prominence (Adams apple)
Superior horns attached to thyrohyoid cartilage
Inferior horns articulate with the cricoid cartilage - 64Describe the cricoid cartilage?A complete ring of hyaline cartilage
Consisting of a broad sheet posteriorly and a narrower arch anteriorly
Completely encircles the airway marking the inferior border of the larynx E - 65Describe the epiglottis?A leaf shaped plate of elastic cartilage which marks the entrance to the larynx
Its 'stalk' is attached to the back of the anterior aspect of the thyroid cartilage
During swallowing the epiglottis flattens and moves posteriorly to close off the larynx and prevent aspiration - 66What are the paired laryngeal cartilages?Arytenoid cartilages
Corniculate cartilages
Cuneiform cartilages - 67Describe the arytenoid cartilages?Pyramidal shaped structures that sit on the cricoid cartilage, they consist of:
Apex - articulates with the corniculate cartilage
Base - articulates with the superior border of the cricoid cartilage
Vocal process - provides attachment for vocal process
Muscular process - provides attachment for the posterior and lateral cricoarytenoid muscles - 68Describe the cornicate cartilages?The cornicate cartilages are minor cartilaginous structures. They articulate with the apices of the arytenoid cartilages
- 69Describe the cuneiform cartilages?The cuneiform cartilages are located within the Ary-epiglottic folds, they have no direct attachment but act to strengthen the folds
- 70Green? Red? Blue? Yellow? Purple?Green: Epiglottis
Red: Thyroid cartilage
Blue: Arytenoid cartilages
Yellow: Cricoid cartilages
Purple: Corniculate cartilages
- 71What are the vocal folds?Superficial to deep:
Non-keratinised stratified squamous epithilium
Reinkes space (watery layer allows epithelium above to vibrate)
Vocal ligament
Vocalis muscle - 72What are the labels?Left
Thyroid cartilage
Cricothyroid cartilage
Median cricothyroid ligament
Right
Vocal ligament
Arytenoid cartilage
Cricoid cartilage
- 73What are the vestibular folds?The false vocal chords that lie superiorly to the true vocal chords
The consist of a vestibular ligament covered by a mucous membrane and are pink in colour
They provide protection to the larynx - 74Where are the labels?Left
Vocal folds
Rima glottidis
Right
Epiglottis
Vestibular folds
- 75What do the extrinsic laryngeal ligaments do?Attach to the components of the larynx to external structures
- 76What do the intrinsic laryngeal ligaments do?Responsible for holing the cartilages of the larynx together as one functional unit internally
- 77What are the labels?Left
Median thyrohyoid ligament
Thyrohyoid membrane
Median cricothyroid ligament
Cricothyroid ligament
Right
Lateral thyrohyoid ligament
Internal laryngeal nerve
Superior laryngeal artery
Cricotracheal ligament
- 78Where are the supra hyoid and infra hyoid muscle groups attached?To the hyoid bone, which is bond to larynx by strong ligments allowing it to move as one unit
- 79What is the function of supra hyoid and infra hyoid muscles as a general rule?Supra hyoid muscles elevate the larynx whist the infra hyoid muscles depress the larynx
- 80What are the labels?Left
Diagastric (anterior belly)
Geniohyoid
Right
Mylohyoid
Stylohyoid
Digastric (posterior belly)
- 81What are the labels?Left
Thyrohyoid
Sternothyroid
Right
Omohyoid
Sternohyoid
Omohyoid
- 82What is the rims glottidis?The opening between the vocal folds and the arytenoid cartilages
- 83What are the intrinsic muscles innervated by?The inferior laryngeal nerve - the terminal branch of the recurrent laryngeal nerve (except the cricothyroid)
- 84Describe the cricothyroid muscle? Attachment, action, innervationAttachment: Originates from the anterolateral aspect of the cricoid cartilage and attaches to the inferior margin and inferior horn of the thyroid cartilage
Action: Stretches and tenses the vocal ligament
Innervation: External laryngeal nerve (branch of superior laryngeal) - 85Describe the thyroarytenoid? Attachement, action, innervationAttachments: Originates from the inferoposterior aspect of the angle of the thyroid cartilage
Actions: Relaxes the vocal ligament
Innervation: Inferior laryngeal nerve (branch of the recurrent laryngeal) - 86Describe the posterior cricoarytenoid? Attachment , action, innervationAttachment: originates from the posterior surface of the cricoid cartilage, attaches to the muscular process of the arytenoid cartilage
Actions: Abducts the vocal chords
Innervation: Inferior laryngeal nerve (branch of the recurrent laryngeal) - 87Describe the lateral cricoarytenoid? Attachment, action, innervationAttachment: Originates from the arch of the cricoid cartilage, and attaches to the muscular process of the arytenoid cartilage
Action: Adducts the vocal folds
Innervation: Inferior laryngeal nerve (branch of the recurrent laryngeal) - 88What does the posterior arytenoid do?The posterior cricoarytenoid muscles are the sole abductors of the vocal folds and thus the only muscle capable of widening the rump glottidis
- 89What does the thyroaryenoid do?The thyroarytenoid acts to relax the vocal ligament allowing a softer voice
- 90What does the cricothyroid do?The cricothyroid stretches and tenses the vocal ligments and so is important for the creation of forceful speech
Also has a role in altering the tone of voice i.e. singing - 91What does the lateral cricoarytenoid do?The lateral cricoarytenoid muscles are the major adductors of the vocal folds. This narrows the rim glottidis, modulating the tone and volume of speech
- 92Describe the transverse and oblique arytenoids? Attachment, action, innervationAttachment: Spans from one arytenoid cartilage to the opposite arytenoid
Action: Adducts the arytenoid cartilages
Innervation: Inferior laryngeal nerve (branch of the recurrent laryngeal nerve ) - 93What do the transverse and oblique arytenoids do?The transverse and oblique muscles adduct the arytenoid cartilages, closing the posterior portion of rima glottidis
This narrows the laryngeal inlet - 94What view is this? What are the labels?Superior view (axial)
Left
Transverse arytenoid muscle
Thyroarytenoid muscle
Right
Posterior cricoarytenoid muscle
Lateral cricoarytenoid muscle
- 95What is the view? What are the labels?Posterior view
Oblique arytenoid muscle
Transverse arytenoid muscle
Posterior cricoarytenoid muscle
- 96What is the anatomical location of the thyroid gland?The anterior neck spanning between C5 and T1 vertebrae
It is an endocrine gland divided into two lobes which are connected by an isthmus
Lies behind sternohyoid and sternothyroid muscles
Inferior to the thyroid cartilage of the larynx - 97What are the labelsThyroid cartilage
Lobe of thyroid gland
Isthmus of thyroid gland
Trachea
- 98Why does the thyroid gland need to be highly vascularised?Because the thyroid gland is an endocrine gland therefore it secretes hormones directly into the blood
- 99What are the two main arteries that supply the thyroid gland?Superior and inferior thyroid arteries
These are paired arteries arising on both left and right - 100Where does the thyroid gland initially form during embryogenesis?The base of the tongue
- 101Where does the superior thyroid artery arise from?It is the first branch of the external carotid artery
After arising the artery descends towards the thyroid gland and generally supplies the superior and anterior portions of the gland - 102Where does the inferior thyroid artery arise from?From the thyrocervical trunk (from subclavian artery)
The artery travels superomedially to reach the inferior pole of the thyroid
It generally supplies the posterior inferior aspect of the thyroid - 103What happens in a small number of people in the thyroid?In around 10% of people there is an additional artery present - the thyroid ima artery
It comes from the brachiocephalic trunk of the aorta supplying the anterior surface and the isthmus - 104Describe the venous drainage of the thyroid gland?Carried out by the superior, middle and inferior thyroid veins which form a venous plexus
The superior and middle veins drain into the internal jugular veins
The inferior drains into the brachiocephalic vein - 105What innervates the thyroid gland?Branches of the sympathetic trunk
However, these nerves do not control endocrine secretion - release of hormones is regulated by the pituitary gland - 106What are the labels?Superior thyroid artery
Superior thyroid vein
Middle thyroid artery
Inferior thyroid vein
Right recurrent larygeal nerve
- 107What is the thyroid gland?A large ductless gland in the neck which secretes hormones regulating growth and development through rate of metabolism
- 108What is the anatomical location of the parathyroid glands?The parathyroid glands are located in the posterior aspect if the lateral lobes of the thyroid gland
They are flatted and oval in shape - 109How many parathyroid glands do most people have?4 along variation in number is common
- 110What are two anatomical divisions of parathyroid glands?Superior parathyroid glands
Inferior parathyroid glands - 111Describe the superior parathyroid glands?Derived embryologically from the fourth pharyngeal pouch
They are located approximately 1cm superior to the entry of the inferior thyroid arteries into the thyroid gland - 112Describe the inferior parathyroid glands?Derived embryologically from the third pharyngeal pouch
Although inconsistent in location between individuals, the inferior parathyroid glands are usually found near the inferior poles of the thyroid glands - 113What is the vascular supply to the parathyroid glands?The inferior thyroid arteries
Drainage via the thyroid plexus of veins - 114What innervates the parathyroid glands?Branches of the cervical sympathetic ganglia
These nerves are vasomotor and NOT neurosecretory, endocrine secretion of parathyroid hormone is controlled hormonally - 115What are the labels?Left
Superior parathyroid gland
Inferior thyroid artery
Right
Thyroid gland
Inferior parathyroid gland
- 116What is the hyoid bone?A U shaped structure located in the anterior neck
- 117Where is the hyoid bone located?It lies at the base of the mandible (approx. C3) where it acts as a site of attachment for the anterior neck muscles
- 118What are the labels?Mandible
Hyoid bone
Larynx
- 119What is the structure of the hyoid bone?Body: central are of the bone, it has an anterior convex surface and a concave posterior surface
Greater horn: projects from each end of the body in a posterior, superior, lateral direction
Lesser horn: arises from the superior aspect of the hyoid bone, near the origin of the greater horn. It projects superoposteriorly - 120What are the labels?Less horn
Body
Greater horn
- 121What are the oral cavity and pharynx muscles that attach to the hyoid bone?Middle pharyngeal constrictor
Hyoglossus
Genioglossus - 122What are the suprahyoid muscles that attach to the hyoid bone?Digastric
Stylohyoid
Geniohyoid
Mylohyoid - 123What are the infra hyoid muscles that attach to the hyoid bone?Thyrohyoid
Omohyoid
Sternohyoid - 124What are the ligament attachment to the hyoid bone?Stylohyoid ligament
Thyrohyoid ligament
Hyoepiglottic ligament - 125What is the function of the extrinsic laryngeal muscles? (sternothyroid, thyrohyoid etc)They move the larynx up and down the neck and support its central position
This is particularly important for swallowing - 126Where may you create an emergency airway?In-between the thyroid and the cricoid cartilage, through the cricothyroid membrane
- 127Why does the thyroid gland have such a good blood supply?Iodine is present in very low concentration in the blood so the gland needs a high blood flow to ensure adequate delivery of iodine
Is also an endocrine gland so secretes hormones directly into blood - 128Which structure may be compressed by an enlarged thyroid gland?The trachea
- 129What is the location of the parathyroid glands and how many are there?They are positioned on the posterior surface of the thyroid gland and there are four
- 130What is the only complete ring of cartilage around the airway?The cricoid cartilage
- 131Why may a patient develop hypocalcaemia after thyroid surgery?The parathyroid glands may be accidentally or deliberately removed during thyroid surgery which will cause acute (sudden) hypothyroidism
- 132What forms the ganglia on the sympathetic chains and the vagus nerve?A collection of neurone cell bodies
- 133What is the name of the fused first thoracic and lower cervical sympathetic ganglia?The stellate ganglion
- 134What structures are supplied by the superior laryngeal nerve?Sensation to the inside of the larynx down to the vocal cords and the cricothyroid muscle
- 135Which special sensation is carried in the glossopharyngeal nerve?Taste from the posterior 1/3 of the tongue
- 136What is the location of the carotid sinus and what does it detect?The origin of the internal carotid artery; blood pressure
- 137What structures lie immediately behind the pharyngeal wall?A then layer of loose areolar tissue and then the cervical vertebral bodies
- 138Which parts of the pharynx lie below the lower border of the mandible?The hypopharynx
- 139What structure stops liquid refluxing into the back of the nose when swallowing?The soft palate
- 140Which nerve carries sensation from the larynx below the vocal cords?The recurrent laryngeal nerves
- 141Describe the histology of the mucosa of the trachea?Simple, columnar, pseudo stratified, ciliated, with goblet cells
- 142Which nerve travels through the parotid gland?The facial nerve (cranial nerve VII)
- 143Where do the parotid and submandibular ducts enter the mouth?Parotid: from the cheek adjacent to the second upper premolar
Submandibular: under the tongue - 144Which nerve supplies the muscles of the tongue?The hypoglossal nerve (cranial nerve XII)
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- Undergraduate first year Anatomy (Areas ) Flashcards on The neck - Anatomy , created by Erin Dunn on 28/11/2018.
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