The finger flick test, also known as the Hoffman sign test, is a neurological exam used to assess for upper motor neuron lesions. It involves observing the involuntary movement of the thumb and/or index finger when the examiner flicks the fingernail of the middle finger downward.
Detailed Explanation
The finger flick test is a quick and simple part of a routine neurological examination. Here's a breakdown of how it's performed and what the results may indicate:
Procedure
- The examiner holds the patient's hand loosely.
- The examiner then flicks the nail of the patient's middle finger downwards.
- The examiner watches for any involuntary movement of the thumb or index finger on the same hand.
Positive Result
- A positive Hoffman sign is indicated by flexion movement of the thumb or index finger or both when the middle finger is flicked.
- A positive result may suggest an upper motor neuron lesion.
Negative Result
- A negative result means there is no involuntary flexion movement observed in the thumb or index finger.
- A negative test indicates there is no significant pathology related to upper motor neurons.
History of the Test
The finger flick test was described by Hans Curschmann in 1911, who was an assistant at the time. It has since become an integral part of standard neurological assessments. According to the provided reference, this test has become a standard part of the common neurologic exam. [1]
| Feature | Description |
|---|---|
| Test Name | Hoffman sign test (or finger flick test) |
| Procedure | Flicking the fingernail of the middle finger downwards. |
| Positive Result | Involuntary flexion movement of the thumb and/or index finger. |
| Indication | May indicate an upper motor neuron lesion. |
| Historical Origin | Described by Hans Curschmann in 1911. |
| Status | Standard part of the common neurologic exam. |
