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The skeletal muscles of the hand enable movement of the hand and fingers. These muscles are categorized into extrinsic and intrinsic groups. The extrinsic muscle bellies originate in the forearm, whereas the intrinsic muscles are smaller and located entirely within the hand, extending from the wrist proximally to the phalanges distally. The intrinsic muscles are essential for fine motor control and contribute significantly to pinch and grip strength (see Image. Intrinsic Hand Muscles).[1] Intrinsic muscle atrophy or weakness is an early clinical sign in conditions such as ulnar neuropathy, lower motor neuron lesions, and certain myopathies. Knowledge of intrinsic muscle anatomy is critical during procedures such as tendon transfers, nerve decompressions, and compartment releases to preserve hand function and optimize outcomes. Understanding the anatomy and physiology of the intrinsic hand muscles enables clinicians to localize neuromuscular pathology, assess functional deficits accurately, and guide targeted interventions.