Ch 17 Wrist, Hand, Fingers-Q1

Name the carpal bones in order of PROXIMAL medial to lateral and DISTAL medial to lateral.

Answer explanation

Scaphoid, Lunate, Triqeutrium, Pisiform

Trapezium, Trapezoid, Capitate, Hamate

What structures comprise the TFCC?

• ECU tendon sheath

• Trapezium

• EDC

• Meniscus homolog

• Aponeurosis

Answer explanation

Composed of articular disc (central fibrocartilage), dorsal/palmar distal radioulnar ligament, ulnolunate & ulnotriquetral ligaments subsheath of ECU tendon, & meniscus monolog (meaning like one), which attaches to the fibrocartilage to the triquetrum.

Where is the hook of the hamate?

Answer explanation

What system is this an image of?

• Trigger finger

• Flexor pulley

• Palmar aponeurosis pulley

• Lumbricals

Answer explanation

These annular pulleys act as tunnels through which the tendons pass to maintain their alignment with the finger. The cruciate pulleys, also numbered from proximal to distal are more pliable and collapse to allow the annular pulleys to move toward each other during finger flexion.

Which category of movement do these muscles belong to?

Groups:

(a) Wrist/Digit flexors

,

(b) Ulnar deviators

,

(c) Wrist/Digit extensors

,

(d) Radial deviators

• Palmaris longus

• Flexor carpi radialis

• Extensor digitorum communis

• Flexor carpi ulnaris

Answer explanation

Palmaris Longus = Wrist flexion