Wrist Joint Chapter 12 Terms
Flexor Carpi Radialis Insertion
Base of second and third metacarpals
Extensor Carpi Radialis Longus Insertion
Base of second metacarpal
Extensor Carpi Radialis Brevis Insertion
Base of third metacarpal
Wrist muscles in order from anterior medial side proceeding laterally around wrist
FCU, FCR, PL, ECRL,ECRB, ECU
Flexor Carpi Ulnaris Insertion
Pisiform and base of 5th Metacarpal
Radial collateral function
Provides lateral support
*Palmar Fascia Function
Provides protection and attachment
Radiocarpal Joint concave surface
Proximal Radius
Loss of radial nerve function results in wrist drop why?
Radial nerve innervates extensor muscles. When nerve is compromised, extension and supination are affected.
Extensor Carpi Radialis Longus Origin
Supracondyler ridge of humerus
radiocarpal joint convex surface
distal carpal
extensor carpi radialis brevis motion(s)
extension
Extensor Carpi Radialis Longus motion(s)
extension, radial deviation
extensor carpi ulnaris motion(s)
extension, ulnar deviation
muscles of wrist that attach on posterior side of wrist
extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris
radial nerve innervation
extensor muscles of the wrist
*Articular disk function
filler between ulna and adjacent carpals
Palmaris longus motion(s)
flexion
flexor carpi radialis motion(s)
flexion
Flexor Carpi Ulnaris Motion(s)
flexion and radial deviation
Radiocarpal motion(s)
flexion, extension, ulnar deviation
Midcarpal Motion(s)
gliding
placing the plate on the counter
neutral wrist position
Extensor Carpi Ulnaris Insertion
base of fifth metacarpal
Radiocarpal Shape
biaxial joint
Wrist extension by extensor carpi radialis longus. Neutralizing muscle?
flexor carpi ulnaris
Wrist flexion by flexor carpi ulnaris. Neutralizing muscle?
flexor carpi ulnaris
muscles weakened by ulnar nerve entrapment
flexor carpi ulnaris
muscles that attach on the base of the fifth metacarpal
flexor carpi ulnaris, extensor carpi ulnaris
Radiocarpal Axis
frontal
Why doesn't extensor carpi radialis play a major role in wrist radial deviation?
inserts at midline of the third metacarpal
the plate is being lowered from the cabinet shelf to the counter
isometric muscle contraction
the plate is being raised from the counter to the cabinet shelf
isometric muscle contraction
Extensor Carpi Radialis Brevis Origin
lateral epicondyle of humerus
Extensor Carpi Ulnaris Origin
lateral epicondyle of humerus
Palmar radiocarpal ligament function
limits extension
Dorsal radiocarpal ligament function
limits flexion
Flexor Carpi Radialis Origin
medial epicondyle of humerus
Flexor Carpi Ulnaris Origin
medial epicondyle of humerus
Palmaris Longus Origin
medial epicondyle of humerus
wrist flexors share a common proximal attachment on or in the area of the
medial epicondyle of humerus
flexor carpi radialis nerve
median
palmaris longus nerve
median
wrist flexors nerve
median and ulnar
starting to remove the plate from the cabinet shelf
neutral wrist position
Midcarpal plane and axis
nonaxial
Nonbony attachment of palmaris longus
palmar fascia
Muscle that doesn't have two bony attachments
palmaris longus
Ulnar collateral ligament function
provides medial support
extensor carpi radialis brevis nerve
radial
extensor carpi radialis longus nerve
radial
extensor carpi ulnaris nerve
radial
wrist extensors nerve
radial
Palpate your partner's pulse at the anterior distal lateral aspect of the forearm, just proximal to the wrist. What artery are you palpating?
radial artery
Wrist extension by extensor carpi radialis longus. Need to neutralize what movement?
radial deviation
opening a jar with a screw on lid using your right hand movement
radial deviation
What structure limits radial deviation?
radius hitting into carpal bones
Radiocarpal Plane
sagittal
Exception: flexor carpi ulnaris nerve
ulnar
flexor carpi ulnaris nerve
ulnar
Wrist flexion by flexor carpi ulnaris. Need to neutralize what movement?
ulnar deviation
opening a jar with a screw-on lid using your left hand movement
ulnar deviation
replacing the lid on the jar using your right hand movement
ulnar deviation
can the position of the elbow joint affect the range of motion of the wrist?
yes
Midcarpal Shape
Irregular
Palmaris Longus Insertion
Palmar Fascia