Shoulder Region Muscles Flashcards by Phillip Ting

Action of Brachialis

Flexion of forearm in all positions

How well did you know this?

Not at all

Perfectly

Action of Deltoid

Anterior part: flexes and medially rotates arm Middle part: abducts arm Posterior part: extends and laterally rotates arm

How well did you know this?

Not at all

Perfectly

Action of Coracobrachialis

Helps flex and adduct arm; resists dislocation of shoulder

How well did you know this?

Not at all

Perfectly

Action of Latissimus Dorsi

Extends, adducts and medially rotates humerus Raises body towards arms during climbing

How well did you know this?

Not at all

Perfectly

Action of Levator Scapulae

Elevates and inferior rotates scapula

How well did you know this?

Not at all

Perfectly

Action of Pectoralis Major

Adducts, internal rotation of humerus, draws scapula anteriorly and inferiorly, flexion of humerus at clavicular head, extension of humerus from a flexed position at sternocostal head

How well did you know this?

Not at all

Perfectly

Action of Pectoralis Minor

Stabilizes scapula by drawing it inferior and anterior along the thoracic wall

How well did you know this?

Not at all

Perfectly

Action of Rhomboid Major

Retracts scapula and rotates to depress glenoid cavity, fix scapula to thoracic wall

How well did you know this?

Not at all

Perfectly

Action of Rhomboid Minor

Retracts scapula and rotates to depress glenoid cavity, fix scapula to thoracic wall

How well did you know this?

Not at all

Perfectly

Action of Subclavius

Anchors and depresses clavicle

How well did you know this?

Not at all

Perfectly

Action of Serratus Anterior

Protraction and superior rotation of scapula

How well did you know this?

Not at all

Perfectly

Action of Subscapularis

Medial Rotation and adduction of the Humerus

How well did you know this?

Not at all

Perfectly

Action of Teres Major

Adducts and medially rotates the arm

How well did you know this?

Not at all

Perfectly

Action of Teres Minor

Lateral rotation of the humerus, helps hold humers in glenoid cavity of the scapula

How well did you know this?

Not at all

Perfectly

Action of the Anconeous

Assists triceps in extending forearm, stabilizes elbow joint; may abduct ulna during pronation

How well did you know this?

Not at all

Perfectly

Action of the Biceps Brachii

Supination of the forearm, flexion of the forearm when supinated Short head of the Biceps Brachii resists dislocation of the shoulder

How well did you know this?

Not at all

Perfectly

Action of the Infraspinatus

Lateral rotation of the humerus, helps hold humerus in glenoid cavity of the scapula

How well did you know this?

Not at all

Perfectly

Action of the Supraspinatus

Initiates and assists the deltoid for horizontal abduction of the humerus

How well did you know this?

Not at all

Perfectly

Action of Trapezius

Descending part: Elevates scapula Ascending part: Depresses Scapula Middle part: Retracts scapula Rotates glenoid superiorly

How well did you know this?

Not at all

Perfectly

Innervation of Brachialis

Musculocutaneous nerve (C5, C6)

How well did you know this?

Not at all

Perfectly

Action of Triceps Brachii

Chief extensor of Forearm, long head resists dislocation of the humerus (important during abduction of the arm)

How well did you know this?

Not at all

Perfectly

Innervation of Coracobrachialis

Musculocutaenous nerve (C5, C6)

How well did you know this?

Not at all

Perfectly

Innervation of Deltoid

Axillary nerve (C5-C6)

How well did you know this?

Not at all

Perfectly

Innervation of Latissimus Dorsi

Thoracodorsal nerve (C6, C7, C8)

How well did you know this?

Not at all

Perfectly

Innervation of Levator Scapulae

Dorsal Scapular (C5) and Cervical Spinal Nerves (C3-C4)

Innervation of Pectoralis Major

Lateral and Medial pectoral nerves

Innervation of Pectoralis Minor

Medial pectoral nerve

Innervation of Rhomboid Minor

Dorsal Scapular nerve (C4-C5)

Innervation of Rhomboid Major

Dorsal Scapular nerve (C4-C5)

Innervation of Serratus Anterior

Long Thoracic Nerve (C5,C6,C7)

Innervation of Subclavius

Nerve to Subclavius

Innervation of Subscapularis

Upper and Lower Subscapular nerves (C5, C6, C7)

Innervation of Teres Major

Lower Scapular Nerve (C5, C6)

Innervation of Teres Minor

Axillary Nerve (C5, C6)

Innervation of the Anconeous

Radial Nerve (C7, C8, T1)

Innervation of the Biceps Brachii

Musculocutaneous nerve (C5, C6)

Innervation of the Infraspinatus

Suprascapular nerve (C5, C6)

Innervation of the Supraspinatus

Suprascapular nerve (C4, C5, C6)

Innervation of Trapezius

Accessory nerve and C3 and C4 spinal nerves

Innervation of Triceps Brachii

Radial Nerve, (C6, C7, C8)

Insertion of Biceps Brachii

Radial Tuberosity and fascia of the forearm via Bicipital aponeurosis

Insertion of Brachialis

Coronoid process and ulnar tuberosity

Insertion of Coracobrachialis

Middle 1/3 of medial surface of humerus

Insertion of Deltoid

Deltoid tuberosity of humerus

Insertion of Latissimus Dorsi

Floor of intertubercular groove of humerus

Insertion of Levator Scapulae

Medial border of scapular superior to root of spine

Insertion of Pectoralis Major

Lateral Lip of intertubercular groove of humerus

Insertion of Pectoralis Minor

Medial border of superior surface of the corocoid process

Insertion of Rhomboid Major

Medial border of scapula from level of spine to inferior angle

Insertion of Rhomboid Minor

Smooth triangular area at medial end of scapular spine

Insertion of Serratus Anterior

Anterior surface of medial border of scapula

Insertion of Subclavius

Inferior surface of middle 1/3 clavicle

Insertion of Subscapularis

Lesser tubercle of Humerus

Insertion of Teres Major

Medial lip of intertubercular groove of humerus

Insertion of Teres Minor

Inferior facet of the greater tubercle of the humerus

Insertion of the Anconeous

Lateral surface of olecranon and superior part of posterior surface of ulna

Insertion of the Infraspinatus

Middle facet of the greater tubercle of humerus

Insertion of the Supraspinatus

Superior facet of greater tubercle of humerus

Insertion of Trapezius

Lateral 1/3 of clavicle, acromion and spine of scapula

Insertion of Triceps Brachii

Olecranon process and fascia of forearm

Origin of Anconeous

Lateral epicondyle of humerus

Origin of Biceps Brachii

Short Head: Tip of Corocoid Process of scapula Long Head: Supraglenoid tubercle of Scapula

Origin of Brachialis

Distal Half of Anterior surface of Humerus

Origin of Coracobrachialis

Tip of coracoid process of scapula

Origin of Deltoid

Lateral 1/3 of clavicle, acromion, and spine of scapula

Origin of Latissimus Dorsi

Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs

Origin of Levator Scapulae

Posterior tubercles of transverse processes C1-C4 vertebrae

Origin of Pectoralis Major

Clavicular Head: Anterior Surfaces of medial 1/2 of clavicle Sternocostal head: Anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscles

Origin of Pectoralis Minor

3rd-5th ribs near their costal cartilages

Origin of Rhomboid Major

Spinous processes of T2-T5

Origin of Rhomboid Minor

Nuchal Ligament, spinous processes of C7 and T1 vertebrae

Origin of Subclavius

Junction of 1st rib and its costal cartilages

Origin of Serratus Anterior

External surfaces of lateral ribs 1-8

Origin of Supraspinatus

Supraspinous fossa of the scapula

Origin of Subscapularis

Subscapular Fossa

Origin of Teres Major

Posterior surface of inferior angle of scapula

Origin of Teres Minor

Middle part of lateral border of scapula

Origin of Infraspinatus

Infraspinous fossa of the scapula

Origin of Trapezius

Medial 1/3 of superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes C7-T12

Origin of Triceps Brachii

Long Head: Infraglenoid tubercle of the scapula Lateral Head: Posterior surface of humerus above radial groove Medial Head: Posterior surface of humerus below radial groove

Shoulder Region Muscles Flashcards

(80 cards)