A&P Lab 23
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
