Unit Two Antebrachial Extensors Flashcards
The posterior compartment is all innervated by what
Radial nerve or branches
What are the three functional groups of the extensors
Muscles that extend and abduct or adduct the hand at wrist, muscle that extend the medial four digits, muscles that extend or abduct the thumb
What muscles extend and abduct or adduct the hand at the wrist
Extensor carpi radialis brevis longus, extensor carpi radialis brevis, extensor carpi ulnaris
What muscles extend the medial four digits
Extensor digitorum, extensor indicis, extensor digiti minimi
What muscles extend or abduct the thumb
Abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus
What muscles attach to the lateral supraepicondylar ridge of humerus and adjacent intermuscular septum
Brachioradialis and extensor carpi radialis longus
What muscles have attachments to the common extensor tendon to the lateral epicondyle
Extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, and extensor digiti minimi
What are the deep extensor muscles
Abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis
The extensor carpi radialis longus has a synergistic function with finger flexors because
It keeps the wrist extended to allow increased grip strength
What muscle has its own sheath
Extensor digiti minimi
What restricts independent extension at the MCP joints of the digits except the index and 5th digit
Oblique intertendinous connection
The tendons on the 2-5 extensor tendons form extensor expansions where
On the distal metacarpals
What joins the extensor expansion
The four tendons of the extensor digitorum join the fascial expansion
Near the PIP, what happens to the extensor expansion
Splits into three parts
What are the three parts of the extensor expansion
Central part and two lateral parts
