Wk 4 1168 Flashcards
What are the flexor forearm muscles- superficial; 5 and their insertion
hint: C.R, P.T, P.L, D.S, C.U
Flexor carpi radialis: base of 2-3 metacarpla
pronator teres: coronoid proc of ulna
palmaris longus: palmeroneurosis
flexor digitorum superficialis: middle phalanx
flexor carpi ulnaris: pisiform
Actions of superficial flexor forearm muscles
Flexor carpi radialis: wrist flexion, radial deviation
pronator teres: pronation, flexion
palmaris longus: wrist flexion
flexor digitorum superficialis: finger flexion up to interphalangeal joints, crosses wrist joints
flexor carpi ulnaris: wrist flexion, ulnar deviation
What are the flexor forearm muscles -deep; 3 and the origin/insertion
flexor pollicis longus: origin- radial shaft, insertion- distal phalanx of digit 1
flexor digitorum profundus: origin ulna
insertion: 2-5 distal phalanges
pronator quadratus:
origin: distal ulna
insertion: distal radius
action of deep flexor forearm muscles
flexor pollicis longus: thumb/ wrist flexion
flexor digitorum profundus: finger joint (up to distal interphalangeal points)/ wrist flexion
pronator quadratus: pronation
Superficial extensor forearm muscles origin and insertion; 5
Hint: C.R.L, C.R.B, E.D, E.D.M, E.C.U
Extensor carpi radialis longus: base of 2nd metacarpal
extensor carpi radialis brevis: base of metacarpal 3
extensor digitorum: 2-5 dorsal expansion
extensor digiti minimi: digit 5 dorsal expansion
extensor carpi ulnaris: base of metacarpal 5
origin: lateral epicondyle
Actions of superficial extensor forearm muscles; 5 and actions
extensor carpi radialis longus: wrist extension, radial deviation
extensor carpi radialis brevis: wrist extension, radial deviation
extensor digitorum: digit and wrist extension
extensor digiti minimi: digit 5, wrist extension
extensor carpi ulnaris: wrist extension, radial deviation
origin and insertion of extensor forearm muscles- deep
abductor pollicis longus:
origin: posterior radius ulna/ interosseous membrane
insertion: base of 1st metacarpal
extensor pollicis brevis:
origin: interosseous membrane/ radius
insertion: proximal phalanx
extensor pollicis longus:
origin: posterior ulna/ interosseous membrane
insertion: distal phalanx
extensor indicis:
origin: posterior ulna interosseous membrane
insertion: dorsal digital expansion of 2
action of deep extensor forearm muscles
abductor pollicis longus: abduction
extensor pollicis breis: extension
extnsor pollicis longus: extension
extensor indicis: extension of digit 2
origin and insertion of lumbricals and action
origin: flexigitorum profundus tendon
insertion: dorsal digital expansion of 2-5
action: flexion of MCP joint
extension of IP joint
what is the dorsal digital expansion
aponeurotic expansion of the digits as a unit,
a muscle attachment site for lumbricals and dorsal/ palmar interossei
what is palmar aponeurosis and its purpose
connective tissue that protects blood vessels and attachment site for palmaris longus
what are synovial sheaths and its function
a membrane covering tendones and produces synovial fluid to provide lubrication for tendons
what are fibrous flexor sheaths
annular and cruciate sheaths to prevent bow string and flexor tendons down
Structures that pass through flexor retinaculum
Tendon of FPL, FDS, FDP, nerve— goes through the carpal tunnels— tendon of FCR
Extensor retinaculum attachments
Distal radius, distal ulna, pisiform, triquetrum, ulnar collateral lifament
