Nerve supply to hypothenar muscles is from :
**Core Concept**
The nerve supply to the hypothenar muscles is a key aspect of hand anatomy, specifically related to the innervation of the intrinsic muscles of the hand. The hypothenar muscles, including the abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi, are responsible for movements of the little finger.
**Why the Correct Answer is Right**
The correct answer involves the ulnar nerve, which is a branch of the medial cord of the brachial plexus. The ulnar nerve is responsible for innervating the intrinsic muscles of the hand, except for the thenar muscles, which are supplied by the median nerve. Specifically, the ulnar nerve provides motor innervation to the hypothenar muscles through the deep branch of the ulnar nerve, also known as the ulnar nerve to the hand. This nerve supply allows for coordinated movement of the little finger.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately represent the nerve supply to the hypothenar muscles.
**Option B:** This option is incorrect because it is not a nerve that supplies the hypothenar muscles.
**Option C:** This option is incorrect because it is not the correct nerve that supplies the hypothenar muscles.
**Clinical Pearl / High-Yield Fact**
The ulnar nerve is also responsible for sensation in the little finger and half of the ring finger. Damage to the ulnar nerve can result in weakness or paralysis of the intrinsic muscles of the hand, leading to difficulty with fine motor movements.
**Correct Answer: C. Ulnar nerve.