Muscles of The Hand (Intrinsic) Flashcards
Abductor digiti minimi - Attachments
FROM
*pisiform
TO
*ulnar side of the base of the proximal phalanx of the 5th digit
Abductor digiti minimi - Actions
abducts 5th digit
Abductor digiti minimi - Innervation
deep branch of the ulnar nerve
C8-T1
Abductor pollicis brevis - Attachments
FROM
*transverse carpal lig.
TO
*radial side of the base of the proximal phalanx of the thumb
*tubercle of trapezium
Abductor pollicis brevis - Actions
abducts thumb
Abductor pollicis brevis - Innervation
recurrent branch of the median nerve
C6-T1
Adductor pollicis - Attachments
FROM
*capitate & 2nd & 3rd metacarpals (oblique head)
*palmar aspect of the 3rd metacarpal (transverse head)
TO
*base of the proximal phalanx of the thumb
Adductor pollicis - Actions
adducts thumb
Adductor pollicis - Innervation
deep branch of the ulnar nerve
C8-T1
Dorsal interossei - Attachments
FROM
*adjacent sides of the metacarpals
TO
*proximal phalangeal bases
*dorsal digital expansions of digits 2-4
Dorsal interossei - Actions
abducts (metacarpophalangeal), flexes (metacarpophalangeal) & extends (interphalangeal) digits 2-4
Dorsal interossei - Innervation
deep branch of the ulnar nerve
C8-T1
Flexor digiti minimi brevis - Attachments
FROM
*hamate
TO
*ulnar side of the base of the proximal phalanx of the 5th digit
Flexor digiti minimi brevis - Actions
flexes (metacarpophalangeal) 5th digit
Flexor digiti minimi brevis - Innervation
deep branch of the ulnar nerve
C8-T1
Flexor pollicis brevis - Attachments
FROM
*transverse carpal lig.
*trapezium
TO
*radial side of the base of the proximal phalanx of the thumb
NOTE: deep head blends with opponens pollicis
Flexor pollicis brevis - Actions
flexes (metacarpophalangeal) thumb
Flexor pollicis brevis - Innervation
*recurrent branch of the median nerve (superficial head)
*deep branch of ulnar nerve (deep head)
(superficial head C6-T1; deep head C8-T1)
Lumbricals - Attachments
FROM
*tendons of the flexor digitorum profundus
TO
*radial side of the dorsal digital expansions of digits 2-5
Lumbricals - Actions
flexes metacarpophalangeal &extends interphalangeal joints of digits 2-5
Lumbricals - Innervation
*deep branch of the ulnar nerve (3rd & 4th lumbricals C8-T1)
*median nerve (1st & 2nd lumbricals C7-8-T1)
Opponens digiti minimi - Attachments
FROM
*hook of the hamate
TO
*ulnar margin of the shaft of the 5th metacarpal
Opponens digiti minimi - Actions
opposition of 5th digit to thumb
Opponens digiti minimi - Innervation
deep branch of the ulnar nerve
C8-T1
Opponens pollicis - Attachments
FROM
*transverse carpal lig.
*trapezium
TO
*palmar surface of the 1st metacarpal
Opponens pollicis - Actions
opposition of thumb to 5th digit
Opponens pollicis - Innervation
recurrent branch of the median nerve
C6-T1
Palmar interossei - Attachments
FROM
*palmar aspects of metacarpals 2, 4 & 5
TO
*dorsal digital expansions of digits 2, 4, 5
Palmar interossei - Actions
adducts (metacarpophalangeal), flexes (metacarpophalangeal) & extends (interphalangeal) digits 2, 4 & 5
Palmar interossei - Innervation
deep branch of the ulnar nerve
C8-T1
