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Anat1 - Upper Limb

(Week 5,7)

QuestionAnswer
The upper lib consists of the arm (_______), forearm (_______), and hand (_______). brachium, antebrachium, manus
___ bones form the skeletal framework of each upper limb. 30
The _______ is the sole bone of the arm. humerus
The humerus articulates with the _______ at the shoulder and the _______ and _______ at the elbow. scapula, radius, ulna
The radius and ulna articulate proximally with the _______ and distally with the _______ bones. They also articulate with ____ ____ proximally and distally. humerus, wrist, each other
The _______ _______ connects the radius and ulna along their entire length. interosseous membrane
The radius lies ______ to the ulna. lateral
The ulna lies _______ in the forearm and is slightly longer than the _______. medially, radius
The anatomical snuff box is made up of: extensor pollicis longus (EPL) abductor pollicis longus (AbPL) extensor pollicis brevis (EPB)
The 8 wrist bones are: Trapezium, Trapezoid, Capitate, Hamate, Scaphoid, Lunate, Triquetral, Pisiform
There are ___ metacarpal bones. 5
The heads of the metacarpal bones articulate with the _______. phalanges
The bases of the metacarpal bones articulate with the _______ proximally, and with _____ _____ medially & laterally. carpals, each other
Each hand contains ___ phalanges. 14
The fingers are numbered 1-5, beginning with the _______. thumb (pollex)
Each finger (except the thumb) has 3 phalanges - _______, _______, and _______. distal, middle, proximal
The thumb has no _______ phalanx. middle
Brachialis O.I.A. O: Anterior distal humerus I: Coranoid process of ulna A: major forearm flexor
Brachioradialis O.I.A. O: distal lateral humerus I: styloid process of radius A: synergist of elbow flexion
The _______ _______ is the prime mover of forearm extension. triceps brachii
The _______ and _______ _______ are the chief forearm flexors. brachialis, biceps brachii
Anconeus O.I.A. O: lateral epicondyle of humerus I: olecranon process of ulna A: Controls ulnar abductionduring forearm pronation; synergist of triceps brachii in elbow extension
The anterior muscles of the forearm are primarily _______ of the wrist and fingers (except pronator quadratus). flexors
The anterior muscles of the forearm originate on the _______ _______ of humerus. medial epicondyle
Pronator Teres O.I.A. O: common tendon medial epicondyle of humerus & coronoid process of ulna I: lat mid radius A: pronation @ elbow, weak elbow flexor
Flexor Carpi Radialis O.I.A. O: common tendon medial epicondyle of humerus I: base 2nd & 3rd metacarpals A: wrist flexion, weak elbow flexion
Palmaris longus O.I.A. O: common tendon medial epicondyle of humerus I: palmar apponeurosis (fascia of palm) A: flexion of wrist, weak flexion of elbow
Flexor Carpi Ulnaris O.I.A. O: common tendon medial epicondyle of humerus I: pisiform, hamate, base of 5th metacarpal A: flexion of wrist, weak flexion of elbow
Flexor Digitorum Superficialis O.I.A. O: common tendon medial epicondyle of humerus I: {middle phalanges of} fingers 2-5 A: flexion of wrist & fingers 2-5
Flexor Pollicus Longus O.I.A. O: ant surface of mid radius, ant ulna {interosseous membrane} I: distal phalanx of thumb A: flexes distal phalanx of thumb (texting)
Flexor Digitorum Profundus O.I.A. O: coronoid process of ulna, ant medial ulna {interosseous membrane} I: distal phalanges 2-5 A: flex {terminal} phalanges 2-5
Pronator Quadratus O.I.A. O: distal portion anterior ulnar shaft I: distal anterior radius A: PM of forearm pronation, synergist pronator teres
The muscles of the posterior forearm are primarily _______ of the wrist and fingers. extensors
The posterior muscles of the forearm originate on the _______ _______ of humerus. lateral epicondyle
Extensor Carpi Radialis Longus O.I.A. O: lateral supracondylar ridge of humerus I: base 2nd metacarpal A: extension of wrist
Extensor Carpi Radialis Brevis O.I.A. O: common extensor tendon lateral epicondyle I: base 3rd metacarpal A: extension and abduction of wrist
Extensor Digitorum O.I.A. O: common extensor tendon lateral epicondyle I: {distal} phalanges 2-5 A: PM extension of fingers, extension of wrist
Extensor Carpi Ulnaris O.I.A. O: common extensor tendon lateral epicondyle {posterior border ulna} I: base of 5th metacarpal A: extension of wrist w/ ECR, Adduction w/ FCU
Supinator O.I.A. O: lateral epicondyle of humerus & proximal ulna I: proximal radius A: supination, assists biceps brachii
Abductor Pollicis Longus O.I.A. O: posterior surface mid radius and ulna {& interosseous membrane} I: base of 1st metacarpal {& trapezius} A: Abducts & extends thumb & Abducts wrist
Extensor Pollicis Longus & Brevis O.I.A. O: dorsal mid radius (brevis), ulna (longus) & interosseous membrane I: base of phalanx of thumb {proximal=brevis, distal=longus} A: extends thumb (lets something go from hand)
Extensor Indicis O.I.A. O: posterior distal ulna & interosseous membrane I: proximal phalanx index finger A: extension of index finger
Created by: sdouglass