Week 4 Flashcards
Origin of Abductor Pollicis Brevis
Lateral pillars (scaphoid and trapezium); Flexor Retinaculum
Insertion of Abductor Pollicis Brevis
Proximal phalanx 1 - lateral base
Nerve of Abductor Pollicis Brevis
Motor recurrent nerve (C8T1)
Action of Abductor Pollicis Brevis
Thumb abduction at CM and MP joints; assists in opposition
Origin of Flexor Pollicis Brevis
Superficial Head: Distal lateral pillars; Flexor retinaculum
Deep Head: Capitate and Trapezoid
Insertion of Flexor Pollicis Brevis
Proximal phalanx 1 - lateral base
Nerve of Flexor Pollicis Brevis
Superficial head: motor recurrent nerve (C8T1)
Deep head: ulnar nerve (C8T1)
Action of Flexor Pollicis Brevis
Thumb flexion at MP joint
Origin of Opponens Pollicis
Distal Lateral Pillars; Flexor Retinaculum
Insertion of Opponens Pollicis
MC1 - shaft, lateral 1/2 palmar surface, whole length
Nerve of Opponens Pollicis
Motor Recurrent nerve (C8T1)
Action of Opponens Pollicis
Thumb opposition at CM joint
Origin of Adductor Pollicis
Oblique head: MC’s 2+3 - anterior bases; Capitate and Trapezoid
Transverse head: MC 3- anterior shaft
Insertion of Adductor Pollicis
Proximal phalanx 1 - medial base
Nerve of Adductor Pollicis
Deep ulnar nerve (C8T1)
Action of Adductor Pollicis
Thumb adduction at CM and MP joints
Origin of Abductor Digiti Minimi
Proximal medial pillar
Insertion of Abductor Digiti Minimi
Proximal phalanx 5 - medial base
Nerve of Abductor Digiti Minimi
Deep Ulnar Nerve (C8T1)
Action of Abductor Digiti Minimi
Little finger abduction at MP joint
Origin of Flexor Digiti Minimi
Distal medial pillar; flexor retinaculum
Insertion of Flexor Digiti Minimi
Proximal phalanx 5 - lateral base
Nerve of Flexor Digiti Minimi
Deep Ulnar Nerve (C8T1)
Action of Flexor Digiti Minimi
Little finger flexion at MP joint
