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Adductor Pollicis
- The fourth intrinsic thumb muscle (OAF and adductor pollicis)
- The adductor pollicis is not a thenar muscle
- Unlike the thenar muscles, the adductor pollicis is innervated by the deep branch of the ulnar nerve
Hypothenar Muscles
Like the thenar muscles, the hypothenar muscles also spell OAF
O=Opponens digit minimi
A=Abductor digit minimi
F=Flexor digit minimi brevis
(Insert – thenars/hypo)
- Three hypothenar muscles form the hypothenar eminence and move the fifth digit
- They lie in the hypothenar compartment with the fifth metacarpal bone
- They are all innervated by the ulnar nerve
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