MS ANA LAB - MOINA

Origin of Pectoralis Major

Clavicle, Sternum, Upper six coastal cartilages

Insertion of Pectoralis Major

Lateral lip of bicipital groove of the humerus

Nerve supply of Pectoralis Major

Lateral and medial pectoral nerves from the brachial plexus.

Action of Pectoralis Major

Adducts arm and rotates it medially.

Origin of Pectoralis Minor

Third, fourth, and fifth ribs

Insertion of Pectoralis Minor

Coracoid process of scapula

Nerve supply of Pectoralis Minor

Medial pectoral nerve from brachial plexus.

Action of Pectoralis Minor

Depresses point of shoulder; it elevates the ribs of origin.

Origin of Subclavius

First coastal cartilage

Insertion of Subclavius

Clavicle

Nerve supply of Subclavius

Nerve to subclavius from upper trunk of brachial plexus.

Action of Subclavius

Depresses the clavicle and steadies this bone during movements of the shoulder girdle.

Origin of Serratus Anterior

Upper eight ribs

Insertion of Serratus Anterior

Medial border and inferior angle of scapula.

Nerve supply of Serratus Anterior

Long thoracic nerve.

Action of Serratus Anterior

Draws the forward anterior around the thoracic wall; rotates scapula.

Origin of Trapezius

Occipital bone, ligamentum nuchae, spine of seventh cervical vertebra, spines of all thoracic vertebrae.

Insertion of Trapezius

Upper fibers into lateral third of clavicle; middle and lower fibers into acromion and spine of scapula.

Nerve supply of Trapezius

Spinal part of accessory nerve (motor) and C3 and C4 (sensory)

Action of Trapezius

Upper fibers elevates the scapula; middle fibers pull scapula medially; lower fibers pull medial border of the scapula downward.

Origin of Latissimus Dorsi

Illiac crest, limbar fascia, spines of lower six thoracic vertebrae, lower thee or four ribs, and inferior angle of scapula

Insertion of Latissimus Dorsi

Floor of bicipital groove of humerus

Nerve supply of Latissimus Dorsi

Thoracodorsal nerve

Action of Latissimus Dorsi

Extends, adducts, and medially rotates the arm.

Origin of Levator Scapulae

Transverse processes of first four cervical vertebrae

Insertion of Levator Scapulae

Medial border of scapula

Nerve supply of Levator Scapulae

C3 and C4 and dorsal scapular nerve

Action of Levator Scapulae

Raises medial border of scapula

Origin of Rhomboid minor

Ligamentum nuchae and spines of seventh cervical and first thoracic vertebrae

Insertion of Rhomboid Minor

Medial border of scapula

Nerve supply of Rhomboid Minor

Dorsal scapular nerve

Action of Rhomboid Minor

Raises medical border of scapula upward and medially

Origin of Rhomboid Major

Second to fifth thoracic spines

Insertion of Rhomboid Major

Medial border of scapula

Nerve supply of Rhomboid Major

Dorsal scapular nerve

Action of Rhomboid Major

Raises medical border of scapula upward and medially

Origin of Deltoid

Lateral third of clavicle, acromion, spine of scapula

Insertion of Deltoid

Middle of lateral surface of shaft of the humerus

Nerve supply of Deltoid

Axillary nerve

Action of Deltoid

Abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm.

Origin of Supraspinatus

Supraspinous fossa of scapula

Insertion of Supraspinatus

Greater tuberosity of humerus; capsule of shoulder joint

Nerve supply of Supraspinatus

Suprascapular nerve

Action of Supraspinatus

Abducts arm and stabilizes shoulder joint

Infraspinatus

Infraspinous fossa of scapula

Insertion of Infraspinatus

Greater tuberosity of humerus; capsule of shoulder joint

Nerve supply of Infraspinatus

Subscapular nerve

Action of Infraspinatus

Laterally rotates arm and stabilizes shoulder joint

Origin of Teres Major

Lower third of lateral border of scapula

Insertion of Teres Major

Medial lip of bicipital groove of humerus

Nerve supply of Teres Major

Lower subscapular nerve

Action of Teres Major

Medially rotates and adducts arm and stabilizes shoulder joint

Origin of Teres Minor

Upper two thirds of lateral border of scapula

Insertion of Teres Minor

Greater tuberosity of humerus; capsule of shoulder joint

Nerve supply of Teres Minor

Axillary Nerve

Action of Teres Minor

Laterally rotates arm and stabilizes shoulder joint

Origin of Subscapularis

Subscapular fossa

Insertion of Subscapularis

Lesser tubercle of humerus

Nerve supply of Subscapularis

Upper and lower subscapular nerve

Action of Subscapularis

Medially rotates arm and stabilizes shoulder joint

Anterior Compartment

Biceps brachii

Origin of Long head

Supraglenoid tubercle of scapula

Anterior Compartment

Biceps brachii

Insertion of Long head

Tuberosity of radius and bicipital aponeurosis into deep fascia of forearm

Anterior Compartment

Biceps brachii

Nerve supply of Long head

Musculocutaneous nerve

Anterior Compartment

Biceps brachii

Action of Long head

Supinator of forearm and flexor of elbow joint'; weak flexor of shoulder joint

Anterior Compartment

Biceps brachii

Origin of Short head

Coracoid process of scapula

Anterior Compartment

Biceps brachii

Origin of Coracobrachialis

Coracoid process of scapula

Anterior Compartment

Biceps brachii

Insertion of Coracobrachialis

Medial aspect of shaft of humerus

Anterior Compartment

Biceps brachii

Nerve supply of Coracobrachialis

Musculocutaneous nerve

Anterior Compartment

Biceps brachii

Action of Coracobrachialis

Flexes arm and also weak adductor

Anterior Compartment

Biceps brachii

Origin of Brachialis

Front of lower half of humerus

Anterior Compartment

Biceps brachii

Insertion of Brachialis

Coracoid process of ulna

Anterior Compartment

Biceps brachii

Nerve supply of Brachialis

Musculocutaneous nerve

Anterior Compartment

Biceps brachii

Action of Brachialis

Flexor of elbow joint

Posterior Compartment

Triceps

Origin of Long head

Infraglenoid tubercle of scapula

Posterior Compartment

Triceps

Origin of Lateral head

Upper half of posterior surface of shaft of humerus

Posterior Compartment

Triceps

Insertion of Lateral head

Olecranon process of ulna

Posterior Compartment

Triceps

Nerve supply of Lateral head

Radial nerve

Posterior Compartment

Triceps

Action of Lateral head

Extensor of elbow joint

Posterior Compartment

Triceps

Origin of Medial head

Lower half of posterior surface of shaft of humerus

Pronator Teres

Origin of Humeral head

Medial epicondyle of humerus

Pronator Teres

Insertion of Humeral head

Lateral aspect of shaft of radius

Pronator Teres

Nerve supply of Humeral head

Median nerve

Pronator Teres

Action of Humeral head

Pronation and flexion of forearm

Pronator Teres

Origin of Ulnar head

Medial border of coracoid process of ulna

Pronator Teres

Origin of Flexor carpi radialis

Medial epicondyle of humerus

Pronator Teres

Insertion of Flexor carpi radialis

Bases of second and third metacarpal bones

Pronator Teres

Nerve supply of Flexor carpi radialis

Median nerve

Pronator Teres

Action of Flexor carpi radialis

Flexes and abducts hand at wrist joint

Pronator Teres

Origin of Palmaris longus

Medial epicondyle of humerus

Pronator Teres

Insertion of Palmaris longus

Flexor retinaculum of palmar aponeurosis

Pronator Teres

Nerve supply of Palmaris longus

Median nerve

Pronator Teres

Action of Palmaris longus

Flexes hand

Flexor Capri Ulnaris

Origin of Humeral head

Medial epicondyle of humerus

Flexor Capri Ulnaris

Insertion of Humeral head

Pisiform bone, hook of the hamate, base of fifth metacarpal bone

Flexor Capri Ulnaris

Nerve supply of Humeral head

Ulnar nerve

Flexor Capri Ulnaris

Action of Humeral head

Flexes and adducts hand at wrist joint

Flexor Capri Ulnaris

Origin of Ulnar head

Medial aspect of olecranon process and posterior border of ulna

Flexor Digitorum Superficialis

Origin of Humeroulnar head

Medial epicondyle of humerus, medial border of coronoid process of ulna

Flexor Digitorum Superficialis

Insertion of Humeroulnar head

Middle phalanx of medial four fingers

Flexor Digitorum Superficialis

Nerve supply of Humeroulnar head

Median nerve