Autoimmune Disorders
White-matter disorders, Paraneoplastic syndromes, Vasculitis and hematologic disorders, Other autoimmune CNS disorders, Peripheral nerve disorders, Neuromuscular junction disorders, Muscle disorders, autoimmune

Degenerative, idiopathic (not clearly hereditary) Disorders
Dementia syndromes, Dementia plus, Movement and posture disorders, Ataxias, myoclonic disorders, Motor neuron disorders, Pure autonomic failure and Shy-Drager syndrome, Other degenerative disorders of the brain, eye and ear, Other degenerative disorders of the spinal cord or peripheral nerves, Degenerative disorders of muscle

Developmental
Neuronal migration disorders, Rachischisis, Macrocephaly. Primary microcephaly, Cerebral palsy, Restricted developmental anomalies, Craniostenosis, Combination of cerebral, cranial and other anomalies, Syringomyelia, syringobulbia

Dysfunction of extraneural organs
Causing neurological disease, Caused by neurological disease

Elipepsy (idiopathic)
Focal epilepsies, Generalized epilepsies, Focal or generalized, Special epileptic syndromes

Genetic Diseases
Muscle, genetic diseases, Metabolic disorders, Lysosomal, peroxisomal disorders, Nucleotide excision repair disorders, Mental retardation, other than metabolic, Dementia, Neurocutaneous disorders (Phakomatoses), Epilepsy, myoclonus, hyperekplexia, Movement disorders, Cerebellar ataxia, other, Eye (visual pathways; ocular motor disorders). Ear, Neoplasms, Vascular, Upper motor neuron. ALS, Lower motor neuron. Nerve

Infection
Parasitic disorders, Protozoal disorders, Spirochetal diseases, Fungal diseases, Bacterial disorders, Abscess, brain, paraspinal, spinal cord, Viral except retrovirus, Retrovirus except HIV, HIV, Prions. Unconventional transmissible agents

Neoplasms
Head tumors, Spinal tumors, Arachnoid cysts, Meningeal carcinomatosis, Brachial and lumbar plexus tumors Peripheral nerve tumors

Nutritional deficiency
Vitamin deficiency, Malabsorption and malnutrition

Pain, primary disorders
Headache, Facial pain, Neck and arm pain, Low back pain, Regional pain syndromes, Fibromyalgia

Sleep disorders
Narcolepsy, Sleep apnea, Restless legs syndrome

Toxic
Alcohol, Drugs of abuse, Heavy metals and other occupational or environmental agents, Animals and plants. Marine toxins, Excessive vitamin consumption, Therapeutic neurologic drugs, Other medications

Trauma
Mechanical, Radiation, Electrocution, Decompression

Vascular
Brain Anoxia, Brain Ischemia, Brain Hemorrhage, Spinal cord

Psychiatric syndromes mimicking neurological disorders
Conversion disorders, Somatization disorders, Anxiety disorders