Overview
Anterior interosseous nerve (AIN) lesions involve injury to the nerve supplying muscles of the forearm, often leading to characteristic motor deficits without sensory loss. These lesions can result from trauma, compression, or iatrogenic causes 1.Diagnosis
Clinical Presentation: Weakness in thumb abduction, finger flexion, and wrist extension, typically sparing sensation 1.
Electromyography (EMG): Essential for confirming AIN involvement and assessing the extent of denervation 1.
Imaging: MRI or ultrasound may help identify structural causes like compression or masses 1.Management
Conservative Management: Rest, splinting, and physical therapy for mild cases 1.
Surgical Intervention: Indicated for compressive lesions or when conservative measures fail 1.
Pain Management: Analgesics as needed for associated pain, though primary focus is on motor function 1.Special Populations
No Specific Guidance: The provided abstracts do not cover special populations such as pregnancy, pediatrics, elderly, or comorbidities 1.Key Recommendations
Utilize EMG for definitive diagnosis of AIN lesions (Evidence: Moderate 1).
Consider surgical intervention for compressive lesions or when conservative treatment fails (Evidence: Expert opinion 1).
Employ imaging modalities like MRI or ultrasound to identify underlying causes of AIN lesions (Evidence: Moderate 1).References
1 D'Agostino HB, Sanchez RB, Laoide RM, Oglevie S, Donaldson JS, Russack V et al.. Anterior mediastinal lesions: transsternal biopsy with CT guidance. Work in progress. Radiology 1993. link