Barrier 1

A 43-year-old female patient presented to the neurology clinic complaining of mild fatigue, occasional tingling sensations in the extremities, and intermittent numbness in the hands and feet. The symptoms had been ongoing for six months, progressively worsening in frequency and intensity. The patient reported no significant medical history or family history of neurological disorders. However, she admitted to a suboptimal diet and a busy lifestyle that often led to irregular eating patterns.

Upon physical examination, the patient's vital signs were within normal limits. Neurological examination revealed no focal deficits, but a diminished sensation was noted in a stocking-glove distribution in the distal extremities. Deep tendon reflexes were brisk, and there were no signs of muscle weakness.

The patient's blood work revealed slightly reduced vitamin B12, folate, and vitamin B6 levels. Notably, the levels of these vitamins were at 62% of the recommended thresholds, indicating a subclinical deficiency. Additional tests were conducted to investigate the neurological symptoms further and rule out other potential causes, including nerve conduction studies (NCS) and electromyography (EMG). The NCS revealed mildly decreased conduction velocities in the peripheral nerves, and EMG showed no evidence of active denervation but indicated decreased recruitment in certain muscle groups. Based on the clinical presentation and investigations, the patient was diagnosed with subclinical B vitamin deficiency, likely contributing to her neurological symptoms.