Lab 4: upper limb Flashcards
What muscles insert at the greater tubercle? (3)
Rotator cuff muscles:
Supraspinatus, infraspinatus, teres minor
What muscle inserts at the lesser tubercle?
Subscapularis
What inserts at the intertubercular groove?
Tendon of the long head of the biceps brachii
What inserts at the deltoid tuberosity?
Deltoid muscles
What muscles originate at the medial epicondyle?
Hand flexor muscles of the forearm
What originates at the lateral epicondyle?
Hand extensor muscle group in forearm
What muscle inserts at the olecranon process?
Triceps brachii
What muscle inserts at the radial tuberosity?
Biceps brachii
How is the neck of the radius held to the ulna?
By the annular ligament, allowing probation and supination
1st carpometacarpal joint: classification and movement
Saddle joint
Adduction/abduction, flexion/extension, opposition
2-5 carpometacarpal joints: classification and movements
Planar joint
Sliding- slight adduction/abduction, slight flexion/extension
1st metacarpophalangeal joint: classification and movements
Hinge or condylar
Flexion/extension, adduction/abduction
2-5 metacarpophalangeal joint: classification and movements
Condylar
Adduction/abduction, flexion/extension, circumduction
Interphalangeal joint:classification and movements
Hinge
Flexion/extension
subscapularis m action
medially rotates arm at shoulder
supraspinatus m action
initiates and assists in abduction of arm at shoulder
infraspinatus m action
laterally rotates arm at shoulder
teres minor m action
laterally rotates arm at shoulder
teres major m: origin, insertion, action
origin: inferior angle of scapula
insertion: medial lip of intertubercular groove of humerus
action: extension, medial rotation, and adduction at the shoulder
coracobrachialis m: origin, insertion, action
origin: coracoid process of scapula
insertion: medial margin of shaft of humerus
action: flexion, adduction of arm at shoulder
pectoralis major m: origin, insertion, action
origin: cartilage of ribs 2-6, body of sternum, inferior medial clavicle
insertion: greater tubercle and intertubercular groove of humerus
action: medial rotation, flexion, adduction of arm at shoulder
latissimus dorsi m: origin, insertion, action
origin: spinous process of inferior thoracic, all lumbar, and sacral vertebrae, ribs 8-12, thoracolumbar fascia
insertion: floor of intertuberculer sulcus of humerus
action: medial rotation, adduction, extension of arm at shoulder
Deltoid: origin, insertion, action
origin: clavicle, acromion, spine of scapula
insertion: deltoid tuberosity (lateral) of humerus
action:
anterior fibers - flexion, medial rotation
posterior fibers - extension, lateral rotation
all - adduction
movements occurring at humeroulnar joint
flexion, extension
biceps brachii m. action
flexion of arm at shoulder, flexion of forearm at elbow, supination
brachialis m. action
flexion of forearm at elbow
brachioradialis m. action
flexion of forearm at elbow
triceps brachii m. action
extension of forearm at elbow
long head involved with extension and adduction of arm at shoulder
anconeus m. action
extension of forearm at elbow
supinator m. action
supinates
pronator teres m. action
rotates radius against ulna at proximal radioulnar joint, pronator of hand
pronator quadratus m. action
rotates radius against ulna at distal radioulnar joint, pronator of hand
what 3 muscles originate at the medial epicondyle?
(wrist flexors) flexor carpi radialis, flexor carpi ulnaris, palmaris longus
what 3 muscles originate at the lateral epicondyle?
(wrist extensors) extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris
what 2 muscles contract to produce adduction of the hand at the wrist? (ulnar deviation)
flexor carpi ulnaris, extensor carpi ulnaris
what 3 muscles would contract to produce abduction of the hand at the wrist? (radial deviation)
flexor carpi radialis, extensor carpi radialis longus and brevis
extensor digitorum m action
extension of the fingers at the metacarpophalangeal joint, extension of the hand at the wrist
flexor digitorum superficialis m. action
flexion of the fingers at the proximal interphalangeal joint, flexion of the fingers at the metacarpophalangeal joint,
flexion of the hand at the wrist
flexor digitorum profundus m. action
flexion of the fingertips at the distal interphalangeal joins (main action), flexion of the fingers at the proximal interphalangeal joints, flexion of the hand at the wrist
dorsal interossei muscle action
abduct and flex digits at metacarpophalangeal joints, extend distal phalanges at interphalangeal joints
palmar interossei muscle action
adduct and flex digits at metacarpophalangeal joints, extend distal phalanges at interphalangeal joint