Hand - Theminar Eminence

Question 0

Flexor Pollicis Brevis

Answer 0

Origin: Flexor Retinaculum (superficial head), Capitate and Trapezium (deep head)
Insertion: Lateral side of the base of the proximal phalanx of thumb
Action: Flexes Thumb
Nerve: Median (via Recurrent Branch)

Question 1

Abductor Pollicis Brevis

Answer 1

Origin: Flexor Retinaculum, Tubercles of Scaphoid and Trapezium
Insertion: Lateral Side of the Base of the Proximal Phalanx of Thumb
Action: Abducts Thumb
Nerve: Median (via Recurrent Branch)

Question 2

Opponens Pollicis

Answer 2

Origin: Tubercle of Trapezium
Insertion: Lateral Side of 1st Metacarpal
Action: Medially Rotates Metacarpal 1 to oppose thumb (Opposition)
Nerve: Median (via Recurrent Branch)