8: Hand Flashcards
CM joints- type?
plane except thumb saddle (btw triquetrium & 5th MCP)
MP joints - type
condyloid
IP joints - type
hinge
Fracture of the base of the thumb is called ..?
Bennett fracture (Defined as an intra-articular two-part fracture)
Causes of Bennett fracture?
resulting from forced abduction
(dorsolateral displacement) of the first
metacarpal by abductor pollicis longus
When an intra-articular fracture of the 1st metacarpal is comminuted, producing at least three parts, it is referred to as a …………….. which has a worse prognosis.
Rolando fracture
Each phalanx has a base, shaft and head
- base articulates with ….
- head articulates with ….
- base = with MCP
- head = with phalanx
Sesamoid bones within the tendons of …….. & ………
adductor pollicis and flexor pollicis brevis
Carpal bones proximal row
Carpal bones distal row
What are the nerves respective to the colors?
Red = ulnar nerve
Blue = radial nerve
Yellow = median N.
dorsal venous arch give origin to …. vein laterally & ….. vein medially
Cephalic = lateral
Basilic = medial
……………. joins the cephalic vein to the basilic vein in the superficial fascia of the cubital fossa.
Median cubital vein
Lateral side: Empty into ……….. nodes which then drain to the apical nodes of the axilla
infraclavicular
Medial side: of the hand and forearm can drain directly into the …….. nodes or to the cubital (supratrochlear) nodes before draining in the …….. nodes
lateral group of axillary nodes
Surface and Superficial Features of the Hand (slide)
Fibrous band from skin to deep fascia attached to flexor retinaculum proximally.
Palmar Aponeurosis
Palmar Aponeurosis
A. Apex
B. Base
A. Its apex continuous with the lower margin of
the transverse carpal ligament, and receives the expanded
tendon of the palmaris longus (it is continuous with it).
B. Distally, its base divides below into four slips extending to each finger
Palmar aponeurosis central portion gives origin by its medial margin to what muscle?
palmaris brevis.
Function of palmar aponeurosis
- Protects the underlying arteries
- Provides a firm attachment to the overlying skin to improve the grip
localized thickening of the palmar aponeurosis (medial part of the palmar aponeurosis undergoes progressive shortening)
Dupuytren’s Contracture
Dupuytren’s Contracture commonly starts near the root of the …(a).. finger and draws that finger into the palm, flexing it at the …(b)… joint. Later, the condition involves the …(c)… finger in the same manner.
(a) ring finger
(b) metacarpophalangeal (MCP joint)
(c) little finger
At long standing cases of Dupuytren’s Contracture, what joints are involved?
MCP and PIP too
DIP not involved
It is a modified deep fascia present opposite to the level of carpal bones. Functionally it holds the long flexor tendons in their position during movement at the wrist joint.
Flexor retinaculum of the Hand
Flexor retinaculum attachments medially & laterally
Structures superficial & deep to flexor retinaculum
Ulnar nerve location/ pathway
Enters cubital tunnel posterior to the medial epicondyle (elbow)
Common location of the ulnar nerve injury resulting in ……….. syndrome.
cubital tunnel syndrome
To be continued ‼️‼️‼️
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