Neuro-physiological study in persons with cervico-brachial disorders

Area of Science:

• Neuroscience
• Neurology
• Occupational Health

Background:

• Cervico-brachial disorders (CBD) are common, but their precise involvement of the nervous system, both central and peripheral, remains unclear.
• Neurophysiological assessments are crucial for understanding the functional impact of CBD.

Purpose of the Study:

• To investigate the neurophysiological underpinnings of cervico-brachial disorders (CBD) by examining peripheral nervous system (PNS) and central nervous system (CNS) function.
• To differentiate neurophysiological changes in patients with CBD, subclinical cases, and healthy controls.

Main Methods:

• Sensory nerve conduction velocities (SCV) in the hands and fingers were used to assess PNS function.
• Auditory event-related potentials (P300) were employed to evaluate higher CNS cognitive functions.
• Participants included patients with CBD, subclinical cases, and healthy controls.

Main Results:

• Peripheral nervous system: A significant reduction in SCV was observed in the index finger of patients, but overall clear evidence of decreased conduction function was lacking.
• Central nervous system: Patients with CBD exhibited significantly delayed latencies and decreased amplitudes in auditory P300 responses.
• CNS findings: P300 latencies showed a significant correlation with symptom scores, suggesting cognitive and memory dysfunction.

Conclusions:

• The study suggests potential central nervous system dysfunction, specifically affecting cognition and memory, in patients with cervico-brachial disorders.
• While peripheral nerve conduction showed limited clear abnormalities, central nervous system changes in P300 responses indicate a potential role for CNS involvement.
• Further research is warranted to fully elucidate the mechanisms underlying nervous system involvement in CBD.