The hypothenar eminence is the fleshy mound on the palm of your hand at the base of your little finger (fifth digit).
This prominent area is formed by a group of three intrinsic muscles that control the movement of the little finger. These muscles are responsible for allowing the little finger to move independently and contribute to grip strength and dexterity.
Here's a breakdown:
- Location: Palmar side (palm) of the hand, specifically at the base of the little finger.
- Composition: Primarily composed of the following three muscles:
- Abductor digiti minimi: Abducts (moves away from the midline) the little finger.
- Flexor digiti minimi brevis: Flexes (bends) the little finger.
- Opponens digiti minimi: Opposes the little finger, bringing it across the palm to meet the thumb.
- Function: These muscles work together to control the movement and positioning of the little finger, enabling actions such as gripping, grasping, and fine motor skills. They are essential for tasks requiring hand dexterity.
Damage or dysfunction of the hypothenar muscles or the ulnar nerve (which innervates these muscles) can lead to weakness, numbness, tingling, or atrophy (muscle wasting) in the little finger and along the ulnar side of the hand. This can impact hand function and grip strength.
