Thenar muscles Flashcards
Origin of flexor pollicis brevis?
Tubercle of the trapezium and the flexor retinaculum
Insertion of flexor pollicis brevis?
Proximal phalanx of thumb
Action of flexor pollicis brevis?
Flexes the thumb at the metacarpophalangeal joint
The thenar muscles are supplied by what nerve?
Recurrent branch of the median nerve
Damage to the reccurent branch of median nerve will lead to ?
Inability to grasp
Origin of abductor pollicics brevis?
Scaphoid and trapezium and retinaculum
Insertion of pollicis brevis?
Proximal phalanx and extensor hood of the thumb
Action of abductor pollicis brevis?
Abducts the thumb
Origin of Opponens pollicis?
`Tubercle of trapezium and flexor retinaculum
Insertion of Opponens pollicis?
Lateral margin and adjacent palmar surface of metacarpal I
Action of opponens pollicis?
medial rotation of thumb
Origin of flexor digiti minimi?
Hook of hamate and flexor retinaculum
Insertion of the flexor digiti minimi?
Proximal phalanx of little finger
Origin of opponens digiti minimi?
Hook of hamate and flexor retinaculum
Insertion of opponens digiti minimi?
Medial aspect of metacarpal 5
Action of opponens digiti minimi ?
Laterally rotates metacarpal 5
Origin abductor digiti minimi?
Pisiform, pisohamate ligamanet, and tendon of flexor carpi ulnaris
Insertion of abductor digiti minimi?
Proximal phalanx of the little finger (metacarpal 5)
Origin of adductor pollicis? Transverse head?
Metacarpal III
Origin of the oblique head of addcutor pollicis?
Capitate and bases of metacarpals II and III
Insertion of adductor pollicis?
Base of proximal phalanx of the thumb
Which artery passes anteromedially between the heads of adductor pollicis?
Radial
Adductor pollicis is innervated by?
Deep ulnar nerve
