Unit 3 Arm: Concept C: Muscles of Forearm & Hand
The posterior compartment of the forearm consists of a total of ______ muscles.
10
Which muscle assists in opposition of the thumb?
Opponens pollicis
Identify the muscles that pronate the forearm.
Pronator quadratus Pronator teres
Which muscle abducts the thumb?
abductor pollicis longus
Compartments in the forearm contain muscles with similar ______.
actions at the wrist joint
Extrinsic muscles of the wrist and hand ______.
flex or extend the hand and fingers
The name of the forearm muscle found in the intermediate layer of the anterior compartment is the ______.
flexor digitorum superficialis
The extensor pollicis_______________extends the MP and IP joints of the thumb.
longus
The muscle that flexes the thumb is the flexor_____________________brevis.
pollicis
The small flexors of the thenar group include the flexor ______ brevis.
pollicis
From lateral to medial, the forearm muscles of the superficial layer of the anterior compartment are the ______.
pronator teres flexor carpi radialis palmaris longus flexor carpi ulnaris
The superficial anterior muscles of the forearm include ______.
pronator teres palmaris longus flexor carpi radialis flexor carpi ulnaris
The extensor carpi________________longus abducts the hand at the wrist.
radialis
The anterior compartment of the forearm is subdivided into three layers, called the _________________, intermediate, and deep layers.
superficial
The muscle layers of the posterior compartment of the forearm are ______ layers.
superficial and deep
The tendons of forearm muscles are individually surrounded by ______ sheaths and collectively held close to the carpal bones by fibrous bands of fascia called ______.
synovial, retinacula
The flexor digitorum superficialis muscle attach to ______.
the middle phalanges of fingers 2-5
The most medial muscle of the superficial layer in the anterior compartment of the forearm is the flexor carpi _________.
ulnaris
Identify the location of the pronator teres.
Anterior forearm
Identify the location of the brachioradialis.
Anterolateral forearm
Which muscles supinate the forearm?
Biceps brachii and supinator
The posterior compartment of the forearm contains muscles that ______ the wrist, the metacarpophalangeal joints, and interphalangeal joints.
Extend
Which are forearm muscles in the superficial layer of the posterior compartment?
Extensor carpi radialis brevis Extensor digiti minimi Extensor carpi ulnaris Extensor carpi radialis longus Extensor digitorum
Place the posterior forearm muscles in the superficial layer in order from lateral to medial.
Extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris
Which of the following is NOT one of the muscles of the hypothenar group of intrinsic hand muscles?
Extensor pollicis brevis
Name the forearm muscles in the deep layer of the posterior compartment?
Extensor pollicis longus Abductor pollicis longus Supinator Extensor indicis Extensor pollicis brevis
Which muscle flexes the little finger?
Flexor digiti minimi brevis
Which are the forearm muscles in the deep layer of the anterior compartment?
Flexor digitorum profundus Pronator quadratus Flexor pollicis longus
Which muscle of the posterior forearm compartment perform(s) a function unlike that of all the others?
Supination
Which of the following correctly describes the tendons of the forearm muscles at the wrist joint?
The flexor retinaculum covers the palmar or anterior surface of the carpal bones.
