Hand
Opposition:
Opponens pollicis
If the ulnar collateral ligament of the first metacarpophalangeal joint ruptures (3rd degree sprain) or becomes chronically lax, abnormal hyperabduction is possible, also known as
Skier thumb
Superficial palmar arch, mainly from the _____ artery
Ulnar
Lumbricals 3 & 4 are innervated by:
Ulnar nerve (deep branch)
Ulnar nerve innervation to the palm and the dorsal and palmar surfaces of the medial _____ digits
1 1/2
____ PADS inserting on digits 2,4,5
3
Median nerve to the palm and the palmar surface of the lateral _____ digits and to the skin of the dorsum over the distal phalanges of those same digits
3 1/2
Superficial branch of the radial nerve to the dorsum and dorsal surface of the lateral ____ digits, except over the distal phalanges
3 1/2
_____ DABS inserting on lateral side of 2 & 3 and medial sides of 3 & 4
4
CM of _____ Flexes and rotates slightly during tight grasp; the fourth CM joint moves slightly to assist
5th finger (pinky)
A person with inflammation in the carpal tunnel could have weakness in any of the following muscles except the A. abductor pollicis brevis B. flexor digitorum profundus C. extensor digitorum D. flexor digitorum superficialis
A. abductor pollicis brevis
Thumb abduction:
APL and APB
Metacarpophalangeal joints permit flexion-extension, ______, and circumduction
Abduction and adduction
Which muscle does NOT make up the anatomical snuffbox? A. Extensor pollicis longus B. Abductor pollicis brevis C. Abductor pollicis longus D. Extensor pollicis brevis
B. Abductor pollicis brevis
The functional position of the hand includes all of the following joint positions except A. flexion of the metacarpophalangeal and interphalangeal joints B. the thumb in slight opposition C. some wrist flexion D. some wrist extension
C. some wrist flexion
________ Is a saddle joint with its own joint cavity formed between the trapezium and base of the first metacarpal
CM joint of the thumb
_____ is the most important of the CM joints
CM joint of the tumb
Have a fibrous capsule that is strengthened on the medial and lateral sides by...
Collateral ligaments
Metacarpophalangeal joints have a fibrous articular capsule that is strengthened medially and laterally by...
Collateral ligaments
Which type of grip is used to grasp the rim of a wheelchair?
Cylindrical grip
Mallet finger isn't really a joint injury but results in permanent inability to extend the ____ joint
DIP
On the back of the hand _______ fascia attached to metacarpal bones
Dorsal interosseous
______ contracture is a pathological thickening and shortening of fibers of the palmar aponeurosis, resulting in continuous flexion of the metacarpophalangeal (MP) and proximal interphalangeal (PIP) joints of the involved digits (usually the ring and little fingers
Dupuytren's
Thumb extension:
EPL, EPB, APL
With the palm down on the table (forearm pronation), raise the second finger off the table. This requires muscle action of the
Extensor indicis
Which muscle originates on the humeral lateral epicondyle and inserts at the base of the distal phalanges of digits 2-5?
FDS
Thumb flexion:
FPL, FPB
On the back of the hand ______ of the dorsum of the hand continuous with antebrachial fascia and extensor expansions
Fascia
If the central band of the extensor expansion ruptures, the PIP joint becomes ______ and the DIP joint _______ in Boutonniére deformity; it occurs commonly in rheumatoid arthritis
Flexed Hyperextended
The proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints are hinge joint that only allow ______ movements
Flexion and extension
Damage to the radial nerve would impair all of the following muscles except the
Flexor pollicis longus
Digital Stenosing Tenosynovitis (Trigger Finger) is with discrepancy between the volume of the ______ and the size of the pulley lumen
Flexor tendon
The intrinsic muscle mass on the little finger side of the palm is made up of which set of muscles?
Hypothenar muscles
Interosseous adductor compartment is formed between the dorsal and palmar ______ fasciae
Interosseous
Mallet finger is rupture or avulsion of the ______ tendon from a distal phalanx due to sudden forced hyperflexion
Long extensor
Which type of grip is used to grasp a plate?
Lumbrical grip
Both groups of interossei assist the lumbricals in flexing the ____ joints while helping to _____ the PIP + DIP joints
MP Extend
Dupuytrens most commonly affect ______ with a hereditary disposition
Males over 50
Carpal tunnel syndrome involves compression of which of the following nerves?
Median nerve
Lumbricals 1 & 2 are innervated by
Median nerve
_________ joints are formed at the knuckles between the heads of the metacarpal bones and bases of the proximal phalanges
Metacarpophalangeal
Intinsic muscles of the hand are situated on its ____ side and innervated by either ulnar or median nerve
Palmar
On the palmar side the central compartment is bounded superficially by the ______, laterally by the ____ compartment, medially by the hypothenar compartment, and dorsally by the palmar interosseous fascia
Palmar aponeurosis Thenar
Deep palmar arch gets its supply from _____ artery
Radial
Which carpal bone makes up the floor of the anatomical snuffbox and is the most frequently fractured carpal bone?
Scaphoid bone
-The patients medical history states that the patient sustained multiple deep lacerations on the palm of his hand and anterior surface of his wrist. During your examination, you put a piece of paper between adjacent surfaces of the patient's index and middle fingers and found him unable to squeeze them together with sufficient force to hold the paper. What muscles are being tested?
Second dorsal and first palmar interosseous muscles
On the back of the hand _______ space is between two fasciae
Subaponeurotic
If the PIP joint becomes hyperextended and the DIP joint flexed due to contracture of interosseous muscles, laxity of the volar plate or musculature imbalance, a ______ deformity results; it also occurs commonly in rheumatoid arthritis
Swan-neck
Blood supply from the hand is from ____ arteries
Ulnar and radial