The hypothenar eminence contains four muscles that act on the little finger. The three primary muscles are the abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi. Each muscle has a specific origin, insertion, nerve supply, and action. The abductor digiti minimi abducts the little finger, the flexor digiti minimi brevis flexes the little finger, and the opponens digiti minimi flexes and rotates the fifth metacarpal bone.

1. Hypothenar Muscle
Presented by,
M HADI UZ ZAMAN
ANSARI
1st BHMS 2022-23 SESSION
ROLL NO-14

2. Intrinsic Muscle
A group of muscles located within or
situated deeper in a structure
1. Thenermuscle
2. Hypothenar muscle
3. Interosseimuscle

3. HYPOTHENER MUSCLE
The hypothenar eminence is made up of four
muscles, but there are only three primary
muscles.
1. Abductor digiti minimi muscle,
2. Flexor digiti minimi brevis muscle,
3. Opponens digiti minimi muscle,
4. Palmaris brevis muscle

4. ABDUCTOR DIGITI MINIMI
• ORIGIN: • Pisiform bone
• INSERTION: • Base of proximal
phalanx of little finger
• NERVE SUPPLY: Deep branch of
ulnar nerve
• ACTION: • Abduction of little
finger.

5. FLEXOR DIGITI MINIMI
• ORIGIN: • Hamate bone • Flexor
retinaculum
• INSERTION: Base of proximal
phalanx of little finger
• NERVE SUPPLY: • Deep branch of
ulnar nerve
• ACTION: Flexion of little finger

6. OPPONENS DIGITI MINIMI
• ORIGIN: • Hamate • Flexor
retinaculum
• INSERTION: • Shaft of 5th metacarpal
bone
• NERVE SUPPLY: • Deep branch of
ulnar nerve
• ACTION: • Flexor of 5th metacarpal
and rotate it. (as making the palm
hollow)

7. PALMARIS BREVIS
This muscle is superficial and lies under the skin
• ORIGIN: Flexor retinaculum • Palmar
aponeurosis
• INSERTION: Skin along medial border of
hand
• NERVE SUPPLY: Ulnar nerve
• ACTION:Helps in gripping by wrinkling
the skin.