ALS Lecture 7 - Movements and Muscles of the Hand DONE Flashcards
flexion of fingers
making a fist
extension of fingers
making hand flat from fist
adduction of the fingers
fingers move towards middle finger
abduction of fingers
fingers move away from middle finger
flexion of thumb
brings thumb across palm
extension of thumb
moving thumb away from fingers/palm
abduction of thumb
moving thumb away from palm
adduction of thumb
moving thumb towards palm
opposition of thumb
connect thumb to fingertip
reposition of thumb
move thumb away from fingertips to its original position
label diagrams of hand movements
done
label the hand grips
done
label the skeleton of the hand
done
number of phalanges
14
radiocarpal joint
radius + carpals
carpometacarpal joints
carpals + metacarpals
metacarpophalangeal joints
metacarpals + proximal phalanges
proximal interphalangeal joints
proximal phalanges + middle phalanges
distal interphalangeal joints
middle phalanges + distal phalanges
lumbricals connect
profundus and superficialis tendons on radial side of each digit
lumbrical nerve supply
radial 2 median nerve, ulnar 2 ulnar nerve
label the diagrams of the lumbricals and tendons
done
lumbricals function
flexion of metacarpophalangeal joints, keep interphalangeal joints extended
muscles at base of thumb
thenar eminence
muscles at base of little finger
hypothenar eminence
label the diagrams of the thenar and hypothenar eminence
done
muscles of the thenar eminence, superficial layer
flexor pollicis brevis, abductor pollicis brevis, opponens pollicis
innervation of muscles of thenar eminence, superficial layer
median nerve
muscles of the thenar eminence superficial layer originate at
flexor retinaculum on carpus
flexor pollicis brevis movement
short flexor of thumb
flexor pollicis brevis inserts into
base of proximal phalanx
abductor pollicis brevis movement
short abductor of the thumb
abductor pollicis brevis inserts into
base of proximal phalanx
opponens pollicis movement
brings thumb over palm for opposition
opponens pollicis inserts into
metacarpal
label the superficial layer of the thenar eminence
done
label the deep layer of the thenar emnience
done
muscles of the thenar eminence, deep layer
adductor pollicis
innervation of muscles of thenar eminence, deep layer
ulnar nerve
the median nerve controls
abduction of thumb
the ulnar nerve controls
adduction of thumb
hypothenar eminence muscles
flexor digiti minimi, abductor digiti minimi, opponens digiti minimi
flexor digiti minimi movement
short flexor of little finger
flexor digiti minimi inserts into
base of proximal phalanx of little finger
abductor digiti minimi movement
short abductor of little finger
abductor digiti minimi inserts into
base of proximal phalanx of little finger
opponens digiti minimi movement
brings little finger over palm for opposition
opponens digiti minimi inserts into
metacarpal
muscles of the hypothenar eminence are innervated by the
median nerve
interosseous muscles
palmar interossei, dorsal interossei
innervation of interosseous muscles
ulnar nerve
palmar interossei goes from….. to…..
metacarpal to extensor apparatus
palmar interossei movement
pull digits toward middle digit, adduction
______ ______ has no palmar interossei
middle digit
palmar interossei are on which digits?
2nd, 4th, 5th
PAD
palmar interossei adduct
dorsal interossei connects
metacarpals to those either side
dorsal interossei pass a
tendon distally to extensor apparatus
dorsal interossei movement
pull digits away from middle digit, abduction
dorsal interossei go between
5th + 4th, 4th + 3rd, 3rd + 2nd, 2nd + 1st
DAB
dorsal interossei abduct
label the diagrams of the interossei
done
label the diagrams of the interossei’s movements
done
median nerve supplies what in the hand?
radial 2 lumbricals, thenar and hypothenar eminence muscles except adductor pollicis
ulnar nerve supplies what in the hand?
adductor pollicis (thenar eminence), ulnar 2 lumbricals, interosseous muscles
median nerve supplies what in the forearm?
all long flexors except flexor carpi ulnaris and half of flexor digitorum profundus
median nerve supplies sensation to
bottom of palm, thumb, index finger, middle finger, half of ring finger
label the diagram of the median nerve
done
if the median nerve was damaged, what would be lost motor wise?
abduction of thumb
test the median nerve by asking pt to…
move thumb over palm then away from palm
does the median nerve branch in the arm?
no
does the ulnar nerve branch in the arm?
no
ulnar nerve supplies what in the forearm?
flexi carpi ulnaris, half of flexi digitroum profundus
ulnar nerve supplies what in the hand?
adductor pollicis
ulnar nerve supplies sensation to
half of ring finger, little finger
we can test the ulnar nerve by asking the patient to
hold paper between fingers, we try to pull it out (tests interossei)
label diagram of ulnar nerve
done
radial nerve supplies what in the forearm?
extensors
radial nerve supplies what in the hand?
nothing
damage to the radial nerve gives…
floppy wrist
radial nerve supplies sensation to
back of hand, but only very small area only by radial nerve (see diagram)
look at the sensation patterns for each of the 3 nerves in the hand
done
label the arteries of the hand diagram
done
superficial palmar arch branches to supply blood to the
digits
deep palmar arch branches to supply blood to the
thumb
