Hypothenar muscles

This tutorial covers the hypothenar muscles, focusing on their origins, insertions, and innervation. The hypothenar muscles, located on the ulnar side of the hand, include the abductor digiti minimi, flexor digiti minimi, opponens digiti minimi, and sometimes the palmaris brevis. Each muscle's origin and insertion points are detailed, along with their innervation by the ulnar nerve. The tutorial emphasizes the anatomical features and locations of these muscles, providing a foundational understanding for further study on their functions.

Where are the hypothenar muscles located in the hand?

• On the radial side of the hand

• On the palmar side of the hand

• On the ulnar side of the hand

• On the dorsal side of the hand

Which muscle is known for defining the medial border of the palm?

• Flexor digiti minimi

• Abductor digiti minimi

• Opponens digiti minimi

• Palmaris brevis

What is a unique feature of the flexor digiti minimi muscle?

• It inserts on the skin of the hypothenar region

• It originates from the pisiform bone

• It is sometimes completely absent

• It is the largest hypothenar muscle

Which muscle is considered the strongest and deepest of the hypothenar muscles?

• Abductor digiti minimi

• Flexor digiti minimi

• Opponens digiti minimi

• Palmaris brevis

Why is the palmaris brevis often not considered a hypothenar muscle?

• It is too small to be considered a muscle

• It is located on the dorsal side of the hand

• It is not innervated by the ulnar nerve

• It differs significantly from the other hypothenar muscles

Which nerve innervates the hypothenar muscles?

• Ulnar nerve

• Radial nerve

• Median nerve

• Musculocutaneous nerve

What is the role of the deep branch of the ulnar nerve?

• It provides sensation to the forearm

• It controls the thumb movements

• It innervates the muscles of the hand

• It supplies the skin of the hand