Flashcards

ANAT2 Muscles

A Jones English 26 cards

Cards in this deck (26)

1—Pectoralis major
O: Clavicular - medial half of clavicle
Sternocostal -sternum, upper 6 costal cartilages, aponeurosis of external oblique
I: lateral lip of inter tubercular groove of humerus,
crest below greater tubercle of humerus
A: Clavicular - flexes arm from full extension
Sternocostal - extends flexed arm
Both parts - adduct and medially rotate arm
N: Medial and lateral pectorial nerves
2—Pectoralis minor
O: External surfaces of ribs 3-5
I: coronoid process of scapula
A: Draws scapula forward and downward,
raises ribs in forced inspiration
N: Medial pectorial nerve
3—Subclavius
O: Junction of 1st rib with its costal cartilage
I: Groove on inferior surface of clavicle
A: Steadies clavicle during movements of shoulder girdle
N: Nerve to subclavius from upper trunk of brachial plexus
4There are several muscles that originate on the coracoid process of the scapula, but what muscle inserts here?Pectoralis Minor
5—Rhomboid major
O: T2-T5 SP and supraspinous lig.
I: Medial border of scapular below spine
A: Retracts and stablises scapula,
elevates medial border of scapula causing downward rotation,
assists in adduction of arm
N: Dorsal scapula nerve
6—Rhomboid minor
O: C7-T1 SP and lower part of lig. nuchae
I: Medial border of scapular at root of spine
A: Retracts and stabilises scapula,
elevates medial border of scapula,
rotates scapula to depress lateral angle and assist in adduction of arm
7—Trapezius
O: Medial 1/3 of superior nuchal line, EOP, lig. nuchae, C7-T12 SP and supraspinous lig
I: Upper - lateral 1/3 of clavicle
Middle - acrominon and spine of scapula
Lower - medial portion of spine of scapula
A: Upper - elevates scapula
Middle - retracts/adducts scapula
Lower - depresses scapula
Upper and lower - rotates scapula
N: Accessory nerve (XI)
8—Latissimus dorsi
O: T7-S5 SP, supraspinous lig. and iliac crest, outer surfaces of lower 3-4 ribs, inferior angle of scapula
I: Bottom of intertubercular groove
A: Extends, adducts and medially rotates arm, draws should down and back, keeps inferior angle of scapular in chest wall, accessory muscle of respiration
N: Thoracodorsal nerve
9—Levator scapulae
O: C1-C4 posterior tubercles of TVP
I: Medial border of scapula at/above the spine
A: Elevates medial border of scapula, rotates scapula to lower the lateral angle,
acts with traps and rhomboids to pull scapula medially and upwards,
bends neck laterally
N: Dorsal scapula nerve
10—Serratus anterior
O: Superior borders of ribs 1-9 and fascia covering first intercostal space
I: Anterior surface of medial border of scapula
A: Rotates scapula for abduction and flexion of arm,
protracts scapula
N: Long thoracic nerve
11—Deltoid
O: Anterior - anterior border and superior surface of lateral 1/3 of clavicle
Middle - lateral border of acromion process
Posterior - lower border of spine of scapula
I: Deltoid tuberosity on humerus
A: Anterior -flexes and medially rotates arm
Middle - abducts arm
Posterior -extends and laterally rotates arm
N: Axillary nerve
12What are the four muscles of the rotator cuff?1. Supraspinatus
2. Infraspinatus
3. Subscapularis
4. Teres minor
13—Supraspinatus
O: Entire supraspinous fossa of scapula
I: Upper part of greater tuberosity of humorous and capsule of shoulder joint
A: Draws humerus toward glenoid fossa preventing deltoid from forcing humerus up against acromion,
aids deltoid in abduction of arm
N: Suprascapular nerve
14—Infraspinatus
O: Entire infraspinous fossa
I: Middle facet of greater tuberosity of humerus and capsule of shoulder joint
A: Draws humerus toward glenoid fossa thus resisting posterior dislocation of arm,
laterally rotates and aids in stabilisation of humerus during abduction
N: Suprascapular nerve
15—Subscapularis
O: Entire subscapular fossa
I: Lesser tuberosity of humerus and ventral part of shoulder joint capsule
A: Medially rotates arm and stabilises glenohumeral joint
N: Upper and lower subscapular nerves
16—Teres minor
O: Upper 2/3 of lateral border of scapula
I: Lower facet of greater tuberosity of humerus and capsule of shoulder joint
A: Laterally rotates arm, weakly adducts arm and draws humerus toward glenoid fossa
N: Axillary nerve
17—Teres major
O: Lower 1/3 of lateral border of scapula near inferior angle
I: Medial lip of intertubercular groove of humerus
A: Medially rotates and extends arm
N: Lower subscapular nerve
18What rotator cuff muscle is most commonly involved in degenerative tendonitis (torn ligament)?Supraspinatus tendon
19—Coracobrachialis
O: Tip of coracoid process of scapula
I: Middle 1/3 of medial surface and border of humerus
A: Adducts arm and aids in stabilising humerus
N: Musculocutaneous nerve
20—Biceps brachii
O: Long head - supraglenoid tubercle of scapula
Short head - coracoid process of scapula
I: Radial tuberosity and bicipital aponeurosis
A: Supinates and flexes forearm,
flexes arm at shoulder
N: Musculocutaneous nerve
21—Brachialis
O: Anterior of lower 1/2 of humerus
I: Coronoid process and ulnar tuberosity
A: Flexes forearm
N: Musculocutaneous nerve
22Which muscle flexes the arm when its pronated??Brachialis
23What produces the 'Popeye' deformity?Rupture of the biceps brachii
24What tendon is susceptible to wear and tear as it moves back and forth within the inter tubercular groove and what is the diagnosis of this inflammation?biceps tendon
biceps tendonitis
25—Triceps
O: Long head - infraglenoid tubercle
Lateral head - upper 1/2 of posterior humerus
Medial head - posterior lower 1/2 of humerus
I: Posterior part of olecranon of ulnar
A: Extends forearm,
long head aids in adduction if arm is abducted
N: Radial nerve
26—Anconeus
O: Posterior part of lateral epicondyle of humerus
I: Lateral surface of olecranon process and posterior surface of ulnar
A: Extends forearm
N: Radial nerve