Nerve Injury (Lower Trunk and Subclavian Vessels)

A Nerve Injury (Lower Trunk and Subclavian Vessels) affects the nerves and blood vessels located near the lower part of the neck and upper chest. This injury involves the lower trunk of the brachial plexus, which controls movement and sensation in the arm and hand. Damage to these nerves can cause weakness, numbness, or paralysis in the affected arm, especially in the hand and fingers. The nearby subclavian vessels, which supply blood to the arm, may also be injured, leading to problems with blood flow. This condition often results from trauma such as accidents or birth injuries and can significantly impact a person's ability to use their arm normally.

Nerve Injury (Lower Trunk and Subclavian Vessels) refers to trauma-induced damage to the lower trunk of the brachial plexus (C8-T1 nerve roots) and the adjacent subclavian artery and vein. The lower trunk injury typically results from excessive abduction or traction on the arm, such as in birth-related Erb-Duchenne palsy or traumatic accidents. This injury leads to motor and sensory deficits primarily affecting the intrinsic hand muscles and the medial forearm. Concurrent injury to the subclavian vessels can cause vascular compromise, including ischemia or hematoma formation. The clinical significance lies in the combined neurological and vascular impairment, which can cause severe functional disability and requires prompt diagnosis to prevent permanent damage.