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[Electrically induced cutaneo-muscular reflex from the m. extensor digitorum brevis]
EEG-EMG Zeitschrift Fur Elektroenzephalographie, Elektromyographie Und Verwandte Gebiete
|June 1, 1987
Summary
This study investigated cutaneo-muscular reflexes in normal subjects, identifying early and late electromyography (EMG) responses. Findings support the transcortical or spino-bulbo-spinal pathways for these reflex responses.
Area of Science:
- Neuroscience
- Human Physiology
- Motor Control
Context:
- Cutaneo-muscular reflexes are crucial for motor control and sensory feedback.
- Understanding reflex pathways aids in diagnosing neurological disorders.
Purpose:
- To record and analyze early and late electromyography (EMG) responses from the extensor digitorum brevis muscle.
- To investigate the latency and duration of these reflexes following electrical stimulation.
- To compare age-related changes in reflex latencies and assess their implications for neural pathway hypotheses.
Summary:
- Electromyography (EMG) responses were recorded from the extensor digitorum brevis muscle in 90 healthy individuals after electrical stimulation of the second toe.
- An early and a late EMG response were observed in 88 subjects, with the second reflex response showing a mean latency of 91.9 ms and a mean duration of 27.3 ms.
- Significant interindividual variability in amplitude was noted. Age-related latency changes were consistent with transcortical or spino-bulbo-spinal pathway involvement.
Impact:
- Provides normative data for cutaneo-muscular reflex latencies and durations.
- Offers insights into the neural pathways mediating short-latency reflexes.
- Contributes to the understanding of age-related changes in the nervous system.