This tutorial covers the muscles of the hand, focusing on the four DNA muscles located on the radial palmar side. It details the abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis muscles, discussing their origins, functions, and innervations. The tutorial explains how these muscles contribute to thumb movement and their anatomical connections, providing a comprehensive overview of their roles in hand mechanics.

Where are the DNA muscles located in the hand?

• On the dorsal side of the hand

• On the radio palmar side of the hand

• On the ulnar side of the hand

• On the back of the hand

What is the primary function of the Abductor Pollicis Brevis muscle?

• To spread the thumb

• To extend the thumb

• To flex the thumb

• To rotate the thumb

Which nerve is responsible for the innervation of the Abductor Pollicis Brevis muscle?

• Ulnar nerve

• Radial nerve

• Median nerve

• Musculocutaneous nerve

What is unique about the structure of the Adductor Pollicis muscle?

• It has two heads

• It is innervated by two nerves

• It is the largest muscle in the hand

• It has three heads

Which nerve innervates the Adductor Pollicis muscle?

• Deep branch of the ulnar nerve

• Median nerve

• Radial nerve

• Superficial branch of the ulnar nerve

What is the innervation peculiarity of the Flexor Pollicis Brevis muscle?

• It is innervated by the radial nerve only

• It is innervated by the ulnar nerve only

• It is innervated by both the ulnar and median nerves

• It is innervated by the median nerve only

What function does the Opponens Pollicis muscle allow?

• Flexion of the thumb

• Opposition of the thumb to other fingers

• Adduction of the thumb

• Extension of the thumb