The term "inverted radial reflex" refers to an abnormal neurological response in which the fingers flex while the wrist extends. The spelling of this word can be explained using IPA phonetic transcription as follows: /ɪnˈvɜrtɛd / ˈreɪdɪəl / ˈriːflɛks/. The first part of the word is spelled with the letter "i" followed by the sound "n" and "v" that represents the "v" sound. Meanwhile, the second part of the word is spelled with "r" and "a" that represent the "ray" sound, and "d", "i", "a", and "l" that make up the "dial" sound. Finally, the word "reflex" is spelled with "r", "e", "f", "l", and "e", with the emphasis
The term "inverted radial reflex" refers to a neurological reflex that involves an abnormal response in the radial nerve pathway. The radial nerve is a major nerve that originates from the brachial plexus and runs down the arm, supplying the triceps and muscles that extend the wrist and fingers. In a normal physiological response, tapping or striking the radial aspect of the forearm elicits a reflexive jerk of the wrist and fingers, resulting in their extension.
However, in the case of an inverted radial reflex, the response is abnormal, as the reflexive action is reversed. This means that instead of extending, the wrist and fingers flex or contract upon stimulation of the radial nerve. This reversal of expected response may indicate a disruption or dysfunction within the nerve pathway or related motor areas in the central nervous system.
The inverted radial reflex can be a pathological sign, suggestive of certain underlying neurological conditions. It may be observed in cases of nerve injury, compression, or entrapment, such as in radial nerve palsy, where the muscles innervated by the radial nerve are weakened or paralyzed. Additionally, disorders affecting motor control centers in the brain, such as certain lesions or strokes, can also lead to the abnormal reflexive response.
The presence of an inverted radial reflex is usually identified through clinical examination and neurological assessments by healthcare professionals. Further investigation and diagnostic tests may be required to determine the root cause of the aberrant reflex and guide appropriate treatment.
Flexion of the fingers without flexion of the forearm, on tapping the lower end of the radius; regarded as indicating a lesion of the fifth cervical segment of the spinal cord.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.