Question

Highlight the movements at the; Radio Carpal Joint, Intercarpal joints, Carpometacarpal joint and Mid carpal joints. High light the muscles involved in bringing about the movements listed above. Make reference to their proximal and distal attachment sites (origins and insertion sites)

Answer 1

RADIO CARPAL JOINT
Type : Ellipsoidal variety

INTERCARPAL JOINT
Type : Gliding variety

CARPOMETACARPAL JOINT
Type : First carpometacarpal joint is Saddle variety. Remaining four are Ellipsoidal variety.

MID CARPAL JOINTS
Type : Gliding variety

JOINTS	MUSCLES	ORIGIN	INSERTION
Radiocarpal joint	Flexor capri ulnaris	Medial epicondyle of humerus. Tendinous arch passing from medial epicondyle of humerus to olecranon process of ulna.	Pisiform bone.
	Flexor capri radialis	Medail epicondyle of humerus.	Palmar surface of base of 2nd metacarpal bone.
	Extensor carpi radialis longus	Lower one third of lateral supracondylar ridge of humerus	Lateral side of base of second metacarpal bone (dorsal aspect)
	Extensor carpi radialis brevis	Lateral epicondyle of humerus	Dorsal aspect of base of second and third metacarpal bone
	Extensor carpi ulnaris	Lateral epicondyle of humerus	Dorsal aspect of base of middle phalanx
	Extensor digitorum	Lateral epicondyle of humerus	Intermediate slip for each digit into base of middle phalanx
	Abductor policis longus	Lateral part of posterior surface of ulna	Radial side of base of first metacarpal
Intercarpal joint	Flexor capri ulnaris	Medial epicondyle of humerus. Tendinous arch passing from medial epicondyle of humerus to olecranon process of ulna.	Pisiform bone.
	Flexor capri radialis	Medail epicondyle of humerus.	Palmar surface of base of 2nd metacarpal bone.
	Palmaris longus	Medial epicondyle of humerus	Flexor retinaculum
	Extensor carpi radialis longus	Lower one third of lateral supracondylar ridge of humerus	Lateral side of base of second metacarpal bone (dorsal aspect)
	Extensor carpi radialis brevis	Lateral epicondyle of humerus	Dorsal aspect of base of second and third metacarpal bone
	Extensor carpi ulnaris	Lateral epicondyle of humerus	Dorsal aspect of base of middle phalanx
	Extensor digitorum	Lateral epicondyle of humerus	Intermediate slip for each digit into base of middle phalanx
	Abductor policis longus	Lateral part of posterior surface of ulna	Radial side of base of first metacarpal
	Extensor pollicis brevis	Posterior surface of radius	Dorsal surface of the base of the proximal phalanx of the thumb
Carpometacarpal joint	Flexor pollicis longus	Middle half of anterior surface of radius	Distal phalanx of thumb
	Opponens pollicis	Trapezium	Metcarpal bone of thumb (radial side)
	Adductor pollicis	Bases of second and third metacarpal	Medial side of base of proximal phalanx of thumb
	Abductor policis longus	Lateral part of posterior surface of ulna	Radial side of base of first metacarpal
	Extensor pollicis brevis	Posterior surface of radius	Dorsal surface of the base of the proximal phalanx of the thumb
	Extensor pollicis longus	Middle third of posterior surface of ulna	Thumb, distal phalanx
	Abductor policis brevis	Tubercle of scaphoid	Lateral side of base of proximal phalanx of thumb
Mid carpal joint	Flexor capri ulnaris	Medial epicondyle of humerus. Tendinous arch passing from medial epicondyle of humerus to olecranon process of ulna.	Pisiform bone.
	Flexor capri radialis	Medail epicondyle of humerus.	Palmar surface of base of 2nd metacarpal bone.
	Extensor carpi radialis longus	Lower one third of lateral supracondylar ridge of humerus	Lateral side of base of second metacarpal bone (dorsal aspect)
	Extensor carpi radialis brevis	Lateral epicondyle of humerus	Dorsal aspect of base of second and third metacarpal bone
	Extensor carpi ulnaris	Lateral epicondyle of humerus	Dorsal aspect of base of middle phalanx
	Extensor digitorum	Lateral epicondyle of humerus	Intermediate slip for each digit into base of middle phalanx
	Abductor policis longus	Lateral part of posterior surface of ulna	Radial side of base of first metacarpal