Muscles that move the Elbow, Radioulnar Joint, Wrist and Hand
What muscle attaches to the radial tuberosity and helps to supinate the radioulnar joint?
Biceps brachii
Anconeus action
Extension of the elbow (stabilization since fibers meld into the capsule)
Wrist extensors: all originate on lateral epicondyle
Extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris
Muscles that move the fingers - extensors
Extensor digitorum
movements of the fingers and thumb
Flexion, Extension, Abduction, Adduction, Opposition (Thumb ONLY)
Muscles that move the thumb - flexors
Flexor pollicis longus
Humeroulnar and Humeroradial joints
Hinge joint,sagittal plane, flexion/extension
Triceps Brachii origin
Long head: infraglenoid tubercle of the scapula
Radioulnar joints: proximal and distal
Pivot joint, transverse plane, pronation/supination
Pronator quadratus action
Pronation
Muscles that move the elbow - extensors
Triceps Brachii, anconeus
Muscles that move the thumb - abductors
abductor pollicis longus, abductor pollicis brevis
Dorsal interossei action
abducts fingers
Abductor pollicis brevis action
abducts thumb
Abductor pollicis longus action
abducts thumb
Muscles that move the thumb - adductors
adductor pollicis
Palmar interossei action
adducts fingers
Adductor pollicis action
adducts thumb
Muscles that move the elbow - flexion
biceps brachii, brachioradialis, brachialis, pronator teres
Muscles that move the fingers - abductors
dorsal interossei
Brachioradialis action
elbow flexion (beer mug raising muscle, helps with flexion while in a semi-pronated position and helps stabilize the elbow in mid-range with quick flexion and extension)
Brachialis action
elbow flexion - prime mover of elbow flexion, more than biceps
Extensor digitorum action
extends fingers
Extensor pollicis longus action
extends thumb
Triceps Brachii action
extension of the elbow/forearm
Extensor pollicis brevis action
extension of thumb
Muscles that move the thumb - extensors
extensor pollicis longus, extensor pollicis brevis
Biceps Brachii action
flexes elbow and supinates forearm - screwdriver
Flexor pollicis longus action
flexes thumb
Flexor carpi radialis action
flexion and radial deviation
flexor carpi ulnaris action
flexion and ulnar deviation
List all the actions of the biceps brachii
flexion of elbow, supination of radioulnar
Flexor digitorum superficialis action
flexion of fingers
flexor digitorum profundus deep action
flexion of fingers (need this muscle to open jars)
palmaris longus action
flexion of wrist
Movements of the wrist
flexion, extension, radial deviation (abduction), ulnar deviation (adduction)
Flexors of the wrist: All originate on the medial epicondyle
flexor carpi radialis, palmaris longus, flexor carpi ulnaris
Muscles that move the fingers - flexors
flexor digitorum superficialis, flexor digitorum profundus deep
Elbow joint
humeroulnar, humeroradial and radioulnar
Biceps Brachii origin
long head: supraglenoid tubercle of scapula short head: coracoid process of scapula
Triceps Brachii insertion
olecranon process of ulna
Muscles that move the thumb - opposition
opponens pollicis
Opponens pollicis action
opposition of thumb
Muscles that move the fingers - adduction
palmer interossei
Pronator Teres action
pronation, weak flexion
Which elbow extensors cross two joints?
pronator teres and the supinator
Muscles that move the radioulnar joints - pronation
pronator teres, pronator quadratus
Biceps Brachii insertion
radial tuberosity
Flexion of the wrist in the anatomical position occurs in what plane?
sagittal
How would you stretch the biceps brachii?
shoulder extension, forearm pronation, elbow extension
Supinator action
supinates forearm
Muscles that move the radioulnar joint- supinators
supinator muscle, biceps brachii
Which movement, radial deviation or ulnar deviation, allows the wrist a greater range of motion and why?
ulnar deviation
How would you attempt to emphasize each of the elbow flexors when you are doing elbow curls?
using a variety of grips
extensor carpi radialis brevis action
wrist extension, radial deviation
extensor carpi radialis longus action
wrist extension, radial deviation
Extensor carpi ulnaris action
wrist extension, ulnar deviation
