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PT 384 hand

QuestionAnswer
What are the hand muscles are innervated by the RADIAL nerve? Abductor pollicus longus, Extensor digiti minimi, Extensor digitorum, Extensor pollicis brevis, Extensor pollicus longus
What are the hand muscles are innervated by the MEDIAN nerve? Abductor pollicus brevis, Flexor digitorum profundus(half), Flexor digitorum superficialis, Flexor pollicis brevis, Flexor pollicis longus, Lumbrical 1, Lumbrical 2, Opponens pollicis.
What are the hand muscles are innervated by the ULNAR nerve? Abuductor digiti minimi, Adductor pollicis, Dorsal interosei, Flexor digiti minimi, Flexor digitorum Profundis (half), Lumbrical, Lumbrical 4, Opponens digi minimi, Palmer interossei
ED nerve Radial
EI nerve Radial
APL nerve Radial
Lumbricals 3 & 4 nerve Ulnar
OP nerve Median
EDM nerve Radial
EPL nerve Radial
EPB nerve Radial
FDS nerve Median
FDP nerve Median & Ulnar
APB nerve Median
Lumbrical 1 & 2 nerve Median
FDM nerve Ulnar
ADM nerve Ulnar
ODM nerve Ulnar
AP nerve Ulnar
Doral interossei nerve Ulnar
Palmar interossei nerve Ulnar
FDS origin Medial epicondyle
FDS insertion Side of Middle phalanx of 4 fingers
FDS action Flexes MCP & PIP joints of fingers
FDP origin Upper 3/4 ulna
FDP insertion Distal phalanx of 4 fingers
FDS action Flexes MCP, PIP, & DIP jonits of 4 fingers
FPL origin Radial, anterior surface
FPL insertion Distal phalanx of thumb
FPL action Flex CMC, MCP & IP thumb joints
APL insertion 1st metacarpal base
APL action Abducts thumb (CMC joint)
EPB insertion Base of proximal phalanx of thumb
EPB action Extends CMC & MCP joints of thumb
EPL insertion Base of distal phalanx of thumb
EPL action Extends CMC, MCP, & IP thumb joints
ED origin Lateral epicondyle of humerus
ED instertion Base of distal phalanx of 4 fingers
ED action Extends MCP, PIP, & DIP joints of 4 fingers
EI insertion Distal of phalanx 2nd finger
EI action Extends MCP, PIP, & DIP joints of 2nd finger
EDM insertion base of distal phalanx of 5th finger
EDM action Extends MCP, PIP, & DIP joints of 5th finger
FPB insertion proximal phalanx of thumb
FPB action Flexes CMC & MCP thumb joints
Is APB intrinsic or extrinsic? intrinsic
APB insertion proximal phalanx of thumb
APB action abducts thumb at CMC joint
OP insertion 1st metacarpal
OP action opposes thumb at CMC joint
AP insertion base of proximal of phalanx thumb
AP action adducts thumb at CMC joint
Dorsal interossei action abducts fingers at MCP joint (DAB)
Palmar interossei action adducts fingers at MCP joint (PAD)
Is the little finger abducted by the interossei? No! The ADM abducts the little finger
List the extrinsic muscles. Flexor Digitorum Superficialis, Flexor Digitorum Pollicis, Flexor Pollicus Longus, Abductor Pollicis Longus, Extensor Digitorum, Extensor Digiti Minimi, Extensor Pollicis Longus, Extensor Pollicis Brevis
Dorsal interossei origin Adjacent metacarpals
Dorsal interossei insertion Base of proximal phalanx
Palmar interossei origin 1st, 2nd, 4th & 5th metacarpals
Palmar interossei insertion Base of proximal phalanx
Why is the base and head of a phalanx larger than it's shaft? To provide greater torque
In which plane does the thumb go into flexion/extension? the frontal plane
In which plane does the thumb go into abduction/adduction? the saggital plane
Why is the Flexion/extension & abduction/adduction of the thumb in planes different then the rest of the body joints? because the thumb is rotated 90 degrees away from the fingers
How many degrees of freedom does the MCP joints have? 2
What plane does abduction occur in the thumb? the sagittal plane
Is the palmer carpal ligament proximal or distal to the wrist? proximal
Which muscles make up the Thenar muscles Adductor pollicis, Opponens pollicis, Flexor pollicis longus, Flexor pollicis brevis
Which muscles make up the anatomical snuff box? Extensor Pollicis longus, Extensor pollicis brevis, Abductor Pollicis Longus
What is the role of the lumbricals and the interossei? 1) Allow flexion of MCP joints before distal joints--more functional grip. 2) Balance pull of ED at finger joints
When there is ulnar nerve damange at wrist level, which muscles will be weak? 1) All interossei, 2) 2 medial lumbricals, 3)hypothenar muscles (FDM, ODM, AbDM), and 4)adductor pollicus.
What happens with ulnar nerve damage at wrist? Claw hand- ED pulls MCP into hyperextension. Long finger flexors pull on PIP & DIP of 4th & 5th fingers
What happens with ulnar nerve danage at elbow? Less of a claw- 1) All interossei, 2) 2 medial lumbricals, 3)hypothenar muscles (FDM, ODM, AbDM), and 4)adductor pollicus. ALSO 1/2 of FDP & FCU
What happens with median nerve damage at wrist?
What muscles make up the hypothenar muscles Flexor digiti minimi, Abductor digiti minimi, Opponens digiti minimi
EI Extensor indicis
FDM insertion Base of proximal phalax of 5th finger
FDM action Flexes CMC & MCP joints of 5th finger
ADM insertion Proximal phalanx of 5th finger
ADM action Abducts MCP joint of 5th finger
ODM insertion 5th metacarpal
ODM action Opposes 5th finger at CMC joint
What is De Quervain’s Disease? Inflammation of sheath containing APL and EPB
What isTrigger Finger (stenosing tenosynovitis)? Swelling of the sheath or tendon
What happens with a radial nerve injury at the wrist? Wrist Drop Loss of extensors of the wrist and hand Sensory loss not devistating
What happen with a median nerve injury at the wrist? Takes out thenar muscles: loss of thumb function Sensory loss is great
What happen with a median nerve injury at the elbow? Takes out all flexors, except FDP to digits 4 and 5 Sensory loss is great
Created by: lap292
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