We're BACK in the forearm with EXTENSOR CARPI ULNARIS muscle!
Extensor: tells us that this muscle "extends something" as far as muscle actions go!
Carpi: refers to the WRIST Ulnaris: referring the the forearm bone: the ULNA (between the Radius & the Ulna - the ulna is on the 'pinky finger' side of the forearm.)
Extensor: tells us that this muscle "extends something" as far as muscle actions go!
Carpi: refers to the WRIST Ulnaris: referring the the forearm bone: the ULNA (between the Radius & the Ulna - the ulna is on the 'pinky finger' side of the forearm.)
Attachment points:
This muscle
originates at the "common extensor tendon" from the lateral epicondyle
of the humerus. This area is just above the elbow and 'common extensor'
refers to the area where many of the wrist extensor muscle muscles come
from.
Insertion point: Base of the 5th metacarpal (the pinky side of the wrist - the pinky is the 5th digit)
Insertion point: Base of the 5th metacarpal (the pinky side of the wrist - the pinky is the 5th digit)
TWO MUSCLE ACTIONS:
By breaking down its name, we know that this muscle EXTENDS THE WRIST (aka - holding your hand out (palm down) and extending fingers towards ceiling - as if to say Hello!)
This muscle also helps to ADDUCT the wrist as well!
Both of these actions happen at the RADIO-CARPAL joint - where the
radius (other forearm bone that isn't the Ulna) and carpal (wrist) bones
meet :)
