A&P Lab 23

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Anconeus Action

Extends elbow

Triceps Brachii Action

Extends elbow

Posterior Deep Extensor Muscles: Extensor Indicis Action

Extends finger 2 (index finger)

Posterior superficial extensor: Extensor Digiti Minimi Action

Extends fingers 5 (little finger)

Which muscles aBDuct hand?

Flexor carpi radialis (ant. superficial) Extensor carpi radialis longus (post. superficial) Extensor carpi radialis brevis (post. superficial)

Muscles that flex WRIST?

All anterior superficial muscles

What other muscle supinates (besides the obvious muscle) the forearm and hand?

Biceps Brachii

Muscles that FLEX elbow?

Biceps Brachii Brachialis Brachioradialis

ALL muscles that more FOREARM?

Biceps Brachii Brachialis Triceps Brachii Brachioradialis Anconeus Supinator Pronator Teres Pronator Quadratus

Arm muscles that aBDuct arm

Deltoid Supraspinatus

Muscles of arm originating on scapula?

Deltoid Teres Major Coracobrachialis

Which muscle of the arm both FLEXES and EXTENDS arm?

Deltoid (bound to be a question!)

Forearm refers to:

Elbow to wrist

Levator Scapulae Action

Elevates scapula

Posterior Deep Extensor Muscles: Extensor Pollicis Brevis Action

Extends thumb

Posterior Deep Extensor Muscles: Extensor Pollicis Longus Action

Extends thumb

Posterior superficial extensor: Extensor Carpi Radialis Brevis Action

Extends wrist and aBDuct hand

Posterior superficial extensor: Extensor Carpi Radialis Longus Action

Extends wrist and aBDuct hand

Posterior superficial extensor: Extensor Carpi Ulnaris Action

Extends wrist and aDDucts hand

Deltoid Action

Extends, aBDucts, flexes arm

Latissimus Dorsi Action

Extends, aDDucts and rotates arm medially

Teres Major Action

Extends, aDDucts, rotates arm medially

Posterior superficial extensor muscles that move hand?

Extensor carpi radialis longus Extensor carpi radialis brevis Extensor Digitorum Extensor Digit Minimi Extensor carpi ulnaris

T/F: there are more muscles that move the forearm than move the hand?

False!

Coracobrachialis Action

Flexes and aDDucts arm

Brachialis Action

Flexes elbow

Brachioradialis Action

Flexes elbow

Biceps Brachii Action

Flexes elbow Supinates forearm and hand

Anterior Deep Flexor Muscles: Flexor Digitorum Profundus Action

Flexes fingers 2-5

Anterior Superficial Flexor Muscles: Flexor Digitorum Superficialis Action

Flexes fingers and wrist

Anterior Deep Flexor Muscles: Flexor Pollicus Longus Action

Flexes thumb

Anterior Superficial Flexor Muscle: Palmaris Longus Action

Flexes wrist

Anterior Superficial Flexor Muscles: Flexor Carpi Radialis Function

Flexes wrist and aBDucts hand

Anterior Superficial Flexor Muscles: Flexor Carpi Ulnaris Action

Flexes wrist and aDDucts hand

Pectoralis Major Action

Flexes, aDDucts, rotates arm medially

Which two muscles aDDuct hand?

Flexor carpi ulnaris (anterior superficial) Extensor carpi ulnaris (posterior superficial)

Anterior Deep Flexor Muscles that move hand?

Flexor digitorum profundus Flexor pollicis longus

Rotator Cuff Muscles

Infraspinatus Supraspinatus Teres Minor Subscapularis

What muscles laterally rotate arm?

Infraspinatus Teres minor Subscapularis

Muscles that extend arm?

Latissimus Dorsi Teres Major Deltoid

Anterior Superficial Flexor Muscles that move hand?

Palmaris longus Flexor Carpi Radialis Flexor carpi ulnaris Flexor digitorum superficialis

Pectoral Girdle ANTERIOR Muscles:

Pectoralis MINOR Serratus Anterior

Muscles that flex arm?

Pectoralis Major Coracobrachialis Deltoid

Muscles of arm originating on axial skeleton?

Pectoralis Major Latissimus Dorsi

Muscles that move arm?

Pectoralis Major Latissimus Dorsi Deltoid Teres Major Coracobrachialis Rotator Cuff Muscles (SITS)

Arm muscles that aDDuct arm

Pectoralis Major Latissimus Dorsi Teres Major Coracobrachialis

Pronator Quadratus Action

Pronates forearm and hand

Pronator Teres Action

Pronates forearm and hand (synergist to pronator quadratus)

The belly of the muscle is usually____to the region pulled?

Proximal

Serratus Anterior Action

Pulls scapula anteriorly (protracts scapula)

Pectoralis Minor Action

Pulls scapula forward and downward Raises ribs

Muscles located in the arm that move the forearm at the elbow joint have insertions on the

Radius and Ulna

Rhomboid Major Action

Retracts and elevates scapula

Rhomboid Minor Action

Retracts and elevates scapula

Which two pectoral girdle muscles elevate scapula?

Rhomboids Major and Rhomboids Minor

Infraspinatus Action

Rotates arm laterally

Subscapularis Action

Rotates arm laterally

Teres Minor Action

Rotates arm laterally

Trapezius Action

Rotates scapula Various fibers raise scapula Pulls scapula medially Pulls scapula and shoulder downward

Chest and shoulder muscles that move the arm at the shoulder joint have insertions on the

Scapula

Rotator cuff muscles all have origins on the

Scapula

Arm refers to which regions?

Shoulder to elbow

Supinator Action

Supinates forearm and hand

Rotator Cuff Muscles

Supraspinatus Infraspinatus Teres Minor Subscapularis

Pectoral Girdle POSTERIOR Muscles:

Trapezius Rhomboid Major Rhomboid Minor Levator Scapulae

Which pectoral girdle muscle ROTATES scapula?

Trapezius (acrobats rotate--way to remember :])

Muscles that EXTEND elbow?

Triceps brachii Anconeus

Posterior Deep Extensor Muscles

aBDuctor pollicis longus Extensor pollicis longus Extensor pollicis brevis Extensor indicis

Supraspinatus Action

aBDucts arm

Posterior Deep Extensor Muscles: aBDuctor Pollicis Longus Action

aBDucts thumb

The belly of the flexor digitorum profundus muscle is located in the

anterior superficial region of the forearm

Hand refers to:

wrist, palm and fingers


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