Hoffmann

Hoffmann is a medical term referring to a reflex action in the human body, specifically the nervous system. The Hoffmann reflex, also known as the Hoffmann's sign or simply H-reflex, is a standard procedure in clinical neurophysiology to assess the function of the nerves, particularly in the spinal cord.

Overview

The Hoffmann reflex is named after the German neurologist Johannes Hoffmann. It is a reflex action in which the thumb and other fingers flex quickly and involuntarily in response to a sharp tap on the nail or flicking the terminal phalanx of the middle or ring finger. This reflex is used to test the integrity of the corticospinal tract, particularly in the cervical spine region.

Procedure

The Hoffmann reflex is elicited by a sudden, forceful flexion of the patient's middle finger. The reflex is considered positive if there is a distinct flexion of the thumb and/or index finger. The presence of the Hoffmann reflex can be an indication of a neurological disorder.

Clinical Significance

The Hoffmann reflex is used as a diagnostic tool in neurology. It is particularly useful in diagnosing conditions such as multiple sclerosis, amyotrophic lateral sclerosis, and spinal cord injury. A positive Hoffmann reflex can indicate upper motor neuron disease or cervical myelopathy.

See Also

• Babinski sign
• Deep tendon reflex
• Upper motor neuron

References

Hoffmann Resources
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