Fichas
Muscles
Fichas del conjunto (18)
- 1Biceps BrachiiAttachments: Long head originates from the supraglenoid tubercle of the scapula, and the short
head originates from the coracoid process of the scapula. Both heads insert distally into the radial tuberosity and the fascia of the forearm via the bicipital aponeurosis.
Function: Supination of the forearm. It also flexes the arm at the elbow and at the shoulder.
Innervation: Musculocutaneous nerve. The bicep tendon reflex tests spinal cord segment C6. - 2CoracobrachialisAttachments: Originates from the coracoid process of the scapula. The muscle passes through the axilla, and attaches the medial side of the humeral shaft, at the level of the deltoid tubercle.
Function: Flexion of the arm at the shoulder, and weak adduction.
Innervation: Musculocutaneous nerve. - 3BrachialisAttachments: Originates from the medial and lateral surfaces of the humeral shaft and inserts into the ulna tuberosity, just distal to the elbow joint.
Function: Flexion at the elbow.
Innervation: Musculocutaneous nerve, with contributions from the radial nerve. - 4Pectoralis MajorAttachments: The distal attachment of both heads is into the intertubercular sulcus of the humerus.
Clavicular head – originates from the anterior surface of the medial clavicle.
Sternocostal head – originates from the anterior surface of the sternum, the superior six costal cartilages and the aponeurosis of the external oblique muscle.
Function: Adducts and medially rotates the upper limb, and draws the scapular anteroinferiorly. The clavicular head also acts individually to flex the upper limb.
Innervation: Lateral and medial pectoral nerves. - 5Pectoralis MinorAttachments: Originates from the 3rd-5th ribs, and inserts into the coracoid process of the scapula.
Function: Stabilises the scapula by drawing it anteroinferiorly against the thoracic wall.
Innervation: Medial pectoral nerve. - 6Serratus AnteriorAttachments: originate from the lateral aspects of ribs 1-8. The muscles attach to the costal (rib facing) surface of the medial border of the scapula.
Function: Rotates the scapula, allowing the arm to be raised over 90 degrees.
It also holds the scapula against the ribcage.
Innervation: Long thoracic nerve. - 7Pectoral region4 muscles:
pectoralis major
pectoralis minor
serratus anterior
subclavius - 8SubclaviusAttachments: Originates from the junction of the 1st rib and its costal cartilage, inserting into the inferior surface of the middle third of the clavicle.
Function: Active stabilisation of the clavicle in the sternoclavicular joint during movements of the shoulder and arm
Innervation: Nerve to subclavius. - 9Shoulder musclesSplit into two groups
Intrinsic
Extrinsic - 10Intrinsic groupOriginates from the scapula and or the clavicle and attaches to the humerus
- 11Intrinsic group is made up of...6 muscles
Deltoid
Teres major
4 rotator cuff muscles:
teres minor, infraspinatus, supraspinatus and subscapularis - 12Deltoidtriangle in shape
Has an anterior, posterior and middle part
Attachment; originates from the scapula and the clavicle and attaches to the deltoid tuberosity of the lateral surface of the humerus
Innervation: Axillary nerve
Action:
Anterior fibres - flex the arm at the shoulder
Posterior fibres- extend the arm at the shoulder
Middle fibres- major abductor of the arm (it takes over from the supraspinatus, which abducts the first 15 degrees) - 13Teres majorAttachments: Originates from the posterior surface of the inferior angle of the scapula. It attaches to the intertubercular groove of the humerus.
Innervation: Lower subscapular nerve.
Actions: Adducts at the shoulder and medially rotates the arm. - 14Rotator cuffs functionRotator cuff muscles are a group of four muscles that originate from the scapula and attach to the humeral head.
These muscles acts to ‘pull’ the humeral head into the glenoid fossa. This gives the glenohumeral joint a lot of additional stability. - 15SupraspinatusAttachments: Originates from the supraspinous fossa of the scapula, attaches to the greater tubercle of the humerus.
Innervation: Suprascapular nerve.
Actions: Abducts the arm 0-15o, and assists deltoid for 15-90o - 16InfraspinatusAttachments: Originates from the infraspinous fossa of the scapula, attaches to the greater tubercle of the humerus.
Innervation: Suprascapular nerve.
Actions: Laterally rotates the arm. - 17SubscapularisAttachments: Originates from the subscapular fossa, on the costal surface of the scapula. It attaches to the lesser tubercle of the humerus.
Innervation: Upper and lower subscapular nerves.
Actions: Medially rotates the arm. - 18Teres MinorAttachments: Originates from the posterior surface of the scapula, adjacent to its lateral border. It attaches to the greater tubercle of the humerus.
Innervation: Axillary nerve.
Actions: Laterally rotates the arm
Información
- Descripción
- Fichas sobre Muscles , creado por Alaha Bakhtiar el 24/01/2017.
- Creado por
- Alaha Bakhtiar · ene 2017
- Actualizado
- 26 ene 2017
- Visitas
- 6
- Valoración