hand muscles

  • Created by: Sarah
  • Created on: 25-05-18 08:31
what do the lumbricals do?
flex at MCP and extend at IP
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where do the lumbricals come from?
the tendons of the flexor digitorum profundus
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where do both the intereossei and lumbricals insert into?
extensor hood
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action of the dorsal interessoei?
abducts the finger at MCP joint
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What joint do the intereoussei work at?
MCP joint
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where do the intereoessi orginate fron?
lateral and medial surfaces of the metacarpals
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what is the innervation of the palmar and dorsal interossei?
ulnar nerve
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what are the 2 extra intrisic muscles that don't fit in a group?
adductor pollicis and palmar brevis
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where can palmar brevis be found?
small thin muscle found very superficially in the subcutaneous tissue of the hypothenar eminence
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where does the palmaris brevis originate and insert?
originates from palmar aponeurosis and flexor retinaculum --> demis of skin
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what does the palmaris brevis do?
wrinkles the skin of the hypothenar eminence deepening the curvature of the hand and improving grip
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where do the adductor pollicis, abductor polics brevis and flexor pollicis brevis al insert into?
proximal phalnx of the thumb
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which thmb muscle inserts into the metacarpal of the thumb?
oppones pollicis
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what are all the thenar muscles innervated by?
median nerve
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what are the lumbricals innervated by?
little + ring finger- ulnar nerve other 3- median nerve
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palmar cutaneous innervation of the hand?
same as lumbricals thumb and 2 1/2 finger median and little finger and 1/2 middle finger ulnar
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dorsal cutaneous innervation of the hand?
ulnar little and half middle finger, then all radial for rest with the tips of the finger tips being median
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what are the hypothenar muscles innervated by?
the ulnar nerve
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what 2 hypothenar muscles originate fron the hook of hamate?
flexor digiti minimi brevis and opponens digiti minimi
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where does the abductor digiti minimi originate from?
the pisiform and then tendon of the flexor carpi ulnaris
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where does AF abductor digiti mini and flexor digiti minimi both insert?
proximal phalnx of little finger
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opponens digiti minimi origin and insertion?
hook of hamate --> metacarpal V
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abductor digiti minimi origin and insertion?
pisiform + FCU -> proximal phalnx of little finger
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flexor digiti minimi brevis O + I?
hook of hamate -> proximal phalnx of little ginger
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what joint does the flexor digiti minimi brevis flex?
MCP joint of little finger
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where does adductor pollicis originate and insert?
one head metacarpal 3 , other head from capitate --> proximal thumb phalnx
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what thenar muslces inset into the proximal phalnx of the thumb?
abductor pollicis brevis, flexor pollicis brevis
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where does the opponens pollicis insert into?
metacarpal of thumb
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what are all thenar muslces innervated by?
median nerve
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where does all thenar muscles originate from?
tubercule of trapezium and flexor retincaculum
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where is the extra origin of abductor pollicis brevis?
scaphoid (ST abducts)
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what are all the hypothenar muscles innervated by?
ulnar nevre
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what is the biggest thenar muscle?
opponens pollicus
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what hypothenar muscles originate from the hook of the hamate and flexor retinaculum?
flexor digiti minimi and opponens digiti minimi
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what hypothenar muslces insert into the base of the proximal phalnx of the little finger?
flexor digiti minimi and abductor digiti minimi
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where does the oppones digiti minimi insert?
metacarpal 5
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why are the hypothenar and thenar group have brevis in the names?
they originate from inside the hand
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what joint does the flexor digiti minimi brevis act on?
flexes MCP joint of little finger
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where does the flexor digiti minimi orginate and insert?
hoox of hamate + FR -> proximal phalnx of little finger
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where does the opponens digiti minimi originate and insert?
hoox of hamate + FR --> metacarpal 5
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where does abductor digiti minimi orginate and insert?
pisiform + tendon of flexor carpi ulnaris -> proximal phalnx of the little finger
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what muscle comes from the tendon of flexor carpi ulnaris?
abductor digiti minimi
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what gives ulnar claw?
denervation of the lumbricals
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Other cards in this set

Card 2

Front

where do the lumbricals come from?

Back

the tendons of the flexor digitorum profundus

Card 3

Front

where do both the intereossei and lumbricals insert into?

Back

Preview of the front of card 3

Card 4

Front

action of the dorsal interessoei?

Back

Preview of the front of card 4

Card 5

Front

What joint do the intereoussei work at?

Back

Preview of the front of card 5
View more cards

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