A boy presents with injury to medial epicondyle of the humerus. Which of the following would not be seen –
**Core Concept**
The medial epicondyle of the humerus is a region prone to injury, particularly in children and adolescents. The ulnar nerve, which runs close to the medial epicondyle, can be damaged in such injuries, leading to a range of symptoms.
**Why the Correct Answer is Right**
The ulnar nerve is responsible for innervating muscles of the forearm, including the flexor carpi ulnaris and the flexor digitorum profundus. Damage to this nerve can result in weakness or paralysis of these muscles, leading to symptoms such as claw hand deformity and weakness in grip strength. The ulnar nerve also provides sensation to the little finger and ring finger.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the injury of the medial epicondyle.
**Option B:** Ulnar nerve damage is a common consequence of medial epicondyle fractures, so this option is incorrect.
**Option D:** This option may be seen in cases of medial epicondyle fractures, particularly if the ulnar nerve is damaged.
**Clinical Pearl / High-Yield Fact**
The ulnar nerve is particularly vulnerable to injury in the region of the medial epicondyle due to its anatomical course, which makes it susceptible to compression and stretching.
**Correct Answer:** A