CLINICAL DIAGNOSTIC MANUAL
Diminished sensation in the hand, also known as hypoesthesia, can be a manifestation of various conditions affecting the nerve structures responsible for the sensory innervation of the hand.
This condition can impair the ability to perform daily tasks and significantly impact the patient’s quality of life. The causes may range from peripheral nerve injuries to cervical nerve root involvement. Accurate identification of the underlying cause is crucial for appropriate treatment.
Pathology | Clinical Symptoms and Signs | Suspected Diagnosis | Confirmatory Diagnosis |
|---|---|---|---|
Median nerve injury | Diminished sensation in the thumb, index, middle finger, and radial half of the ring finger, weakness in thumb opposition | Medical history, neurological examination, signs of carpal tunnel syndrome | EMG, nerve conduction studies |
Ulnar nerve injury | Diminished sensation in the little finger and ulnar half of the ring finger, weakness in little finger abduction | Medical history, neurological examination, signs of ulnar nerve compression | EMG, nerve conduction studies |
Radial nerve injury | Diminished sensation on the back of the hand, weakness in wrist and finger extension | Medical history, neurological examination, signs of radial nerve injury | EMG, nerve conduction studies |
Posterior root injury of C7 | Diminished sensation in the middle finger, weakness in elbow, wrist, and finger extension | Medical history, neurological examination, radicular pain in C7 | Cervical MRI, nerve conduction studies |
Posterior root injury of C8 | Diminished sensation in the little finger and medial part of the ring finger, weakness in finger flexion | Medical history, neurological examination, radicular pain in C8 | Cervical MRI, nerve conduction studies |
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