Class Two Ap1 Muscles

Class Two Muscles of the Forearm

Supraspinatus P: Supraspinous Fossa of the scapula D: Greater tubercle of the humerus 1. Abducts the arm at the shoulder joint Part of the rotator cuff muscle group

Infraspinatus P: Infraspinous fossa of the scapula D: Greater tubercle of the humerus 1. Laterally rotates the arm at the shoulder joint Part of the rotaor cuff muscle group

Teres minor P: Superior lateral border of the scapula D: Greater tubercle of the humerus 1. Laterally rotates the arm at the shoulder joint Part of the rotator cuff muscle group

Subscapularis P: Subscapular fossa of the scapula D: Lesser tubercle of the humerus 1. Medially rotates the arm at the shoulder joint Part of the rotator cuff muscle group

Teres Major P: Inferior lateral border of the scapula D: Medial lip of the bicipital groove of the humerus 1. Medially rotates the arm at the shoulder joint 2. Adducts the arm at the shoulder joint 3. Extends the arm at the shoulder joint

Deltoid P: Lateral clavicle, acromion process, and the spine of the scapula D: Deltoid tuberosity of the humerus 1. Abducts the arm at the shoulder joint (entire muscle) 2. Flexes the arm at the shoulder joint (anterior deltoid) 3. Extends the arm at the shoulder joint (posterior deltoid) 4. Medially rotates the arm at the shoulder joint (anterior deltoid) 5. Laterally rotates the arm at the shoulder joint (posterior deltoid)

Coracobrachialis P: Coracoid process of the scapula D: Medial shaft of the humerus Flexes the arm at the shoulder joint Adducts the arm at the shoulder joint

Biceps Brachii P: Long head: Supraglenoid tubercle of the scapula Short head: Coracoid process of the scapula D: Radial tuberosity Flexes the forearm at the elbow joint (entire muscle) Supinates the forearm at the radioulnar joints (entire muscle) Flexes the arm at the shoulder joint (entire muscle)

Brachialis P: Distal ½ of the anterior shaft of the humerus D: Ulnar tuberosity 1. Flexes the forearm at the elbow joint

Triceps Brachii P: Long head: Infraglenoid tubercle of the scapula Lateral head: Posterior shaft of the humerus Medial head: Posterior shaft of the humerus D: Olecranon process of the ulna 1. Extends the forearm at the elbow joint

Pronator Teres Muscle P: Humeral head: Medial epicondyle of the humerus via common flexor tendon Unlnar head: Coronoid process of ulna D: Laterla radius Pronates the forearm at the radioulnar joint Flexes the forearm at the elbow joint

Flexor Carpi Radialis P: Medial epicondyle of the humerus D: Radial hand on the anterior side Flexes the hand at the wrist joint Radially deviates (abducts) the hand at the wrist joint

Palmaris Longus P: Medial epicondyle of the humerus D: Palm of hand 1. Flexes the hand at the wrist joint

Palmaris Longus Inserts to the palm of the hand

Flexor Carpi Ulnaris P: Medial epicondyle of the humerus D: Ulnar hand on the anterior side Flexes the hand at the wrist joint Ulnar deviates (adducts) the hand at the wrist joint

Flexor Carpi Ulnaris: Medial epicondyle of the Humerus via the Common Flexor Tendon and the Ulna

Brachioradialis P: Lateral supracondylar ridge of the humerus D: Styloid process of the radius 1. Flexes the forearm at the elbow joint

Flexor Digitorum Superficialis Flexes fingers 2-5 at the metacarpophalangeal and proximal interphalangeal joints Flexes the hand at the wrist

Pronator Quadratus P: Anterior distal ulna D: Anterior distal radius 1. Pronates the forearm at the radioulnar joints

Flexor digitorum profundus Flexes fingers 2-5 at the metacarpophalangeal and proximal and distal interphalangeal joints Flexes the hand at the wrist

Extensor Carpi Radialis Longus P: Lateral supracondylar ridge of the humerus D: Radial hand on the posterior side Extends the hand at the wrist joint Radially deviates (abducts) the hand at the wrist joint

Extensor Digitorum Extends fingers 2-5 at the metacarpophalangeal and proximal and distal interphalangeal joints Extends the hand at the wrist joint

Extensor Carpi Radialis Brevis P: Lateral epicondyle of the humerus D: Radial hand on the posterior side Extends the hand at the wrist joint Radially deviates (abducts) the hand at the wrist joint

Extensor Digiti Minimi Extends the Little Finger at the Metacarpophalangeal and Proximal and Distal Interphalangeal Joints Extends the hand at the wrist joint

Extensor Carpi Ulnaris P: Lateral epicondyle of the humerus and the ulna D: Ulnar hand on the posterior side Extends the hand at the wrist joint Ulnar deviates (adducts) the hand at the wrist joint

Supinator P: Lateral epicondyle of the humerus and proximal ulna D: Proximal radius 1. Supinates the forearm at the radioulnar joints

The Thenar Group: Abductor Pollicis Brevis Flexor Pollicis Brevis Opponens Pollicis

The Hypothenar Group Abductor Digiti Minimi Manus Flexor Digiti Minimi Manus Opponens Digiti Minimi

The Central Compartment Group Adductor Pollicis Lumbricals Manus Palmar Interossei Dorsal Interossei Manus

A Superficial Fascial Muscle Palmaris Brevis

Have the client seated Partially flex forearm and have the forearm half way between pronation and supination. Place palpating hand on the proximal anterior medial forearm Have the client further flex or pronate the forearm and feel for contraction of the pronator teres The proximal attachment is the medial epicondyle of the humerus and the distal attachment is the lateral radius underneath the brachioradialis

Client seated Place palpating hand across anterior wrist Have client actively flex and radially deviate the hand at the wrist joint and feel for the distal tendon on the radial side just lateral to the palmaris longus Palpate proximally toward the medial epicondyle It is difficult to palpate the proximal tendon because it blends with the common flexor tendon of the elbow

Have client seated Place palpating hand on anterior wrist Ask the client to cup the hand (bring thenar and hypothenar eminence together) Ask client to flex the hand at the wrist joint against resistance with the fingers fully extended; feel for the distal tendon of the palmaris longus in the center of the wrist. Palpate proximally to the common flexor tendon of the elbow

Have client seated Place palpating hand across anterior wrist Have client actively flex and ulnar deviate the hand at the wrist joint and feel for the distal tendon on the medial side of the anterior wrist. Palpate proximally toward the medial epicondyle and the common flexor tendon of the elbow.

Have client seated with forearm flexed at the elbow 90 degrees, and in a position halfway between pronation and supination. Place palpating hand on lateral forearm. Resist client from further flexing the forearm and feel for contraction of the brachioradialis. Palpate distally to the styloid process of the radius and proximally to the lateral supracondylar ridge of the humerus.

Have client seated (This is a difficult muscle to palpate). Place palpating hand distally on the lateral anterior forearm. Find the radial pulse and then palpate on either side of it to locate the pronator quadratus. Resist the client from actively pronating the forearm at the radioulnar joints and feel for contraction of the muscle.

Have client seated Place palpating hand posterior to brachioradialis Ask client to make a fist in a slightly extended position and feel for contraction of the muscle. Continue palpating proximally toward the lateral supracondylar ridge of the humerus. Continue palpating distally to the 2 nd metacarpal

Client seated Pinch the radial group of forearm muscles with your thumb on one side and your fingers on the other and slightly pull them away from forearm. The fingers on the posterior aspect of the radial group are on the extensor carpi radialis brevis Have client actively extend and/or radially deviate the hand at the wrist to feel for contraction of the muscle. The distal tendon can be palpated by having the client make a fist with the wrist slightly extended. Attaches to 3 rd metacarpal.

Have client seated Place palpating hand directly posterior to the shaft of the ulna and feel for the belly of the extensor carpi ulnaris. Continue palpating proximally toward the lateral epicondyle of the humerus and distally toward the 5 th metacarpal. Have the client extend and ulnar deviate the wrist to further bring out this muscle.

Have the client seated with the forearm passively flexed, pronated, and resting on the lap Pinch the radial group of the forearm muscles with your thumb on one side and your fingers on the other side. Palpate deeper against the radius between the radial group of the forearm and the extensor digitorum to locate the radial attachment of the supinator Have client slowly supinate the forearm and feel for contraction of the supinator Palpate proximally toward the lateral epicondyle and ulnar attachment.

Class Two Ap1 Muscles

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Class Two Ap1 Muscles