S2_L4: Wrist and Hand Flashcards
What movements can the radiocarpal joint perform?
flex, extend, abduct (radial deviate) and adduct (ulnar deviate)
FILL IN THE BLANKS.
If the muscle is inserted medially, it will (1)_____
If the muscle is inserted laterally, it will (2)_____
- adduct
- abduct
What type of joint is the 1st CMC?
saddle joint
The 2nd-5th CMC joints are what type of joints?
synovial plane joints
Name 4 tests to confirm CTS syndrome.
- Flick’s test
- Tinel’s test
- Prayer’s test
- Phalen’s test
The following is a predisposing factor for CTS, EXCEPT:
A. pregnancy
B. diabetes
C. arthritis
D. fracture
E. none
E. none
What injury involves a fracture to the 5th metacarpal, usually caused by punching?
Boxers’ fracture
The bones that make up the palm of the hand are called the
metacarpals
The bones in the fingers are called
phalanges
The eight bones that make up the wrist are the
carpals
TRUE OR FALSE: The third metacarpal has no palmar interosseous
True
The _____ muscle acts as the palmar interosseous of the thumb
adductor pollicis
Normally there are only 3 palmar interossei. If so, which interossei faces medially and laterally?
1st - medial
2nd & 3rd - lateral
What is the dermatomal level of T1?
medial aspect of arm
What is the dermatomal level of C7
middle finger
What is the dermatomal level of C5
lateral aspect of the arm
What is the myotome level of C6?
elbow flex, wrist extend
What is the myotome level of C8?
fingers flexion, thumb extension
The deep tendon reflex of C5-C6 is for what muscle?
biceps brachii
Case: Pt. who complains of pain on his neck, radiates to the arm up to the thumb. Upon physical exam, there is sensory deficit on the thumb, difficulty and weakness in elbow flexion and wrist extension and absence of brachioradialis reflex. What root is affected?
C6
SCENARIO: Pt. had an accident and fell. Upon examination, there is sensory loss at middle finger, absence of triceps reflex, and he cannot extend elbow nor flex the wrist What root is affected?
C7
A sliding door deformity means?
There is lateral winging of the scapula
The wrist is also called?
carpus
The following is true about the radiocarpal joint, EXCEPT:
A. Articulation between the distal end of the radius and
the articular disc above and the scaphoid and lunate
B. It is an ellipsoid joint/condyloid
C. Have anterior and posterior ligaments that strengthen the capsule
D. Innervated by the anterior interosseous nerve and deep branch of radial nerve
E. None
A. Articulation between the distal end of the radius and
the articular disc above and the scaphoid and lunate
NOTE: It also articulated with the triquetral bone
What movement happens in the intercarpal joints?
gliding
The following is true about the flexor retinaculum, EXCEPT:
A. Is a thickening of deep fascia
B. Holds/supports the long flexor tendons in position at
the wrist
C. Converts the convex anterior surface of the hand into the carpal tunnel
D. Attach medially to the pisiform & hamate
E. Attach laterally to the scaphoid and trapezium bones
C. Converts the convex anterior surface of the hand into the carpal tunnel
NOTE: The anterior surface is concave.
The flexor digitorum profundus is said to be dually innervated. Which nerves supply this muscle?
ulnar and anterior interosseous nerve
Ill fitted crutches may cause impingement in what nerve?
Radial Nerve
The 1st metacarpal articulates with what carpal bone?
trapezium
TRUE OR FALSE: The 3rd metacarpal only articulated with the capitate among the carpal bones.
True
MCP joints are what type of joints?
Synovial condyloid joints