Forearm/wrist Flashcards
Muscles that extend the medial four digits:
- Extensor Digitorum
- Extensor Indicis
- Extensor Digiti Minimi
Muscles that extend and abduct or adduct the hand at the wrist joint:
- Extensor Carpi Radialis Longus
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
Muscles that extend or abduct the thumb:
- Abductor Pollicus Longus
- Extensor Pollicus Brevis
- Extensor Pollicus Longus
What are the extensor tendons held in place by?
The extensor retinaculum
Synovial tendon sheaths do what?
They cover the tendons of the extensor muscles of the forearm as they pass through the osseofibrous tunnel to reduce friction.
Acronym for wrist bones
Some - scaphoid Lovers - lunate Try - triquetrum Positions - pisiform That - trapezium They - trapezoid Can't - capitate Handle - hamate
What are the borders of the snuff box?
- Extensor Pollicus Longus
- Extensor Pollicus Brevis
- Abductor Pollicis Brevis
What form the floor of the snuff box?
- Radial artery
- Scaphoid
- Trapezium
Muscles of the superficial anterior layer:
- Pronator Teres
- Flexor Carpi Radialis
- Palmaris Longus
- Flexor Carpi Ulnaris
Muscle of the anterior intermediate layer:
-Flexor Digitorum Superficialis
Muscles of the anterior deep layer:
- Flexor Digitorum Profundus
- Flexor Pollicus Longus
- Pronator Quadratus
Do the deep muscles of the anterior forearm cross the elbow joint?
No they do not. The superficial and intermediate layers do.
What type of joint is the distal radio-ulnar joint?
-Pivot type of synovial joint
What muscle is the most common muscle involved with tennis elbow?
Extensor Carpi Radialis Brevis
What is the most common fracture of the forearm?
A colles fracture, complete fracture of the distal 2cm of the radius (dinner fork deformity), and the styloid process of the ulna is broken off (avulsed).
