This chapter explores neurology, including lesion location, drugs and the nervous system, cerebral blood supply, testing peripheral nerves, dermatomes and peripheral nerves, headache, migraine, blackouts, vertigo and dizziness, hearing loss and tinnitus, acute bilateral leg weakness, abnormal involuntary movements (dyskinesia), stroke, transient ischaemic attack (TIA), subarachnoid haemorrhage (SAH), intracranial venous thrombosis (IVT), subdural haematoma, extradural (epidural) haematoma, delirium (acute confusional state), dementia, Alzheimer’s disease (AD), epilepsy, Parkinsonism, multiple sclerosis (MS), space-occupying lesions (SOL), idiopathic intracranial hypertension, Bell’s palsy, mononeuropathies, polyneuropathies, autonomic neuropathy, motor neuron disease (MND), bulbar palsy, cervical spondylosis, myopathy, myasthenia gravis (MG), Lambert–Eaton myasthenic syndrome (LEMS), neurofibromatosis, syingomyelia, and retroviruses and neurology.