kiranmayi
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what are the muscles and nerves involved with its movements?
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| kiranmayi
Forum Guru
Topics: 237
Posts: 407
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Extension is provided by the extensors pollicis longus and brevis, which are innervated by the radial nerve.
The median nerve supplies the thenar group, which allows the thumb to oppose, flex, abduct, and rotate.
The ulnar nerve supplies the adductor pollicis, which adducts the thumb.
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| SDK
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1)Thenar muscles.
a)Flexor pollicics brevis..
-->Superficial head is supplied by Median N
-->Deep head by Ulner N
-->Actions: Flexion of thumb
b)Opponen pollicis.
--> Median N
--> Opposition of thumb(Flexion & medial rotation)
c)Adductor pollicis.
--> Ulner N
--> Adduction(forceful griping)
d)Abductor pollicis brevis.
--> Median N
-->Abduction of thumb
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| SDK
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Movement of the thgumb joint:
1)Flexion:
a)Flexor pollicis brevis(median & ulner N)
b)Opponen pollicis(Median N)
c)Flexor pollicis longus(Ant: Interosseus N..Median N)
2)Extension:
a)Abductor pollicis longus(Radial N)
b)Extensor pollicis longus(Radial N)
c)Extensor pollicis brevis(Radial N)
3)Abduction:
a)Abductor pollicis brevis(Median N)
b)abductor pollicis longus(Radial N)
4)Adduction:
a)Adductor pollicis(Ulner N)
5)Opposition:
a)Opponen pollicis(Median N)
b)Flexor pollicis brevis(Median & Ulner N)
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| mildus
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very good, thanks
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| SDK
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Posts: 1,587
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