MRCP UK EXAMINATIONS

Detailed explanation-1: -Anterior interosseus syndrome is an isolated palsy of flexor pollicus longus, the index and long fingers of the flexor digitorum profundus, and the pronator quadratus muscles of the forearm. It manifests as pain in the forearm accompanied commonly by the weakness of the index and thumb finger pincer movement.

Detailed explanation-2: -The effect of trauma on the median nerve depends on the injury site and may involve the palm, forearm, arm, or axilla. The damage to the nerve can lead to motor, sensory, and vasomotor loss. Most injuries to the median nerve occur at the wrist.

Detailed explanation-3: -It manifests mostly as pain in the forearm accompanied frequently by a characteristic weakness of the index and thumb finger pincer movement. Many cases of AIN syndrome arise secondary to transient neuritis, although nerve compression and trauma are known etiologies as well.

Detailed explanation-4: -Anterior Interosseous nerve (AIN) syndrome is a rare syndrome that comprises less than 1% of all upper extremity nerve palsies, arising due to compression or inflammation of the AIN of the forearm. The AIN is purely a motor branch of the median nerve that arises from its dorsomedial aspect, just inferior to the elbow.