| 1. | Abetalipoproteinemia (1 recruiting study) |
| 2. | Acromegaly (5 recruiting studies) |
| 3. | Acute Idiopathic Polyneuritis (1 recruiting study) |
| 4. | Adrenoleukodystrophy (3 recruiting studies) |
| 5. | AIDS Dementia Complex (2 recruiting studies) |
| 6. | Alzheimer Disease (46 recruiting studies) |
| 7. | Amblyopia (3 recruiting studies) |
| 8. | Amnesia (4 recruiting studies) |
| 9. | Amyotrophic Lateral Sclerosis (6 recruiting studies) |
| 10. | Aphasia (4 recruiting studies) |
| 11. | Apraxia, Ideomotor (2 recruiting studies) |
| 12. | Apraxias (3 recruiting studies) |
| 13. | Arachnoiditis (1 recruiting study) |
| 14. | Arnold-Chiari Malformation (2 recruiting studies) |
| 15. | Articulation Disorders (2 recruiting studies) |
| 16. | Ataxia (5 recruiting studies) |
| 17. | Auditory Diseases, Central (1 recruiting study) |
| 18. | Auditory Perceptual Disorders (1 recruiting study) |
| 19. | Autoimmune Diseases of the Nervous System (23 recruiting studies) |
| 20. | Autonomic Nervous System Diseases (4 recruiting studies) |
| 21. | Back Pain (8 recruiting studies) |
| 22. | Bardet-Biedl Syndrome (1 recruiting study) |
| 23. | Basal Ganglia Diseases (46 recruiting studies) |
| 24. | Benign Essential Tremor Syndrome (4 recruiting studies) |
| 25. | Bifunctional Enzyme Deficiency (1 recruiting study) |
| 26. | Blindness (4 recruiting studies) |
| 27. | Botulism (1 recruiting study) |
| 28. | Brain Concussion (1 recruiting study) |
| 29. | Brain Damage, Chronic (6 recruiting studies) |
| 30. | Brain Diseases (306 recruiting studies) |
| 31. | Brain Diseases, Metabolic (19 recruiting studies) |
| 32. | Brain Diseases, Metabolic, Inborn (19 recruiting studies) |
| 33. | Brain Edema (2 recruiting studies) |
| 34. | Brain Infarction (1 recruiting study) |
| 35. | Brain Injuries (19 recruiting studies) |
| 36. | Brain Ischemia (5 recruiting studies) |
| 37. | Brain Neoplasms (128 recruiting studies) |
| 38. | Brain Stem Neoplasms (1 recruiting study) |
| 39. | Brown-Sequard Syndrome (1 recruiting study) |
| 40. | Carotid Artery Diseases (2 recruiting studies) |
| 41. | Carotid Stenosis (1 recruiting study) |
| 42. | Carpal Tunnel Syndrome (2 recruiting studies) |
| 43. | Cataplexy (4 recruiting studies) |
| 44. | Causalgia (2 recruiting studies) |
| 45. | Central Cord Syndrome (1 recruiting study) |
| 46. | Central Nervous System Bacterial Infections (1 recruiting study) |
| 47. | Central Nervous System Diseases (354 recruiting studies) |
| 48. | Central Nervous System Infections (12 recruiting studies) |
| 49. | Central Nervous System Neoplasms (101 recruiting studies) |
| 50. | Central Nervous System Viral Diseases (10 recruiting studies) |
| 51. | Cerebellar Diseases (3 recruiting studies) |
| 52. | Cerebral Arterial Diseases (1 recruiting study) |
| 53. | Cerebral Hemorrhage (3 recruiting studies) |
| 54. | Cerebral Infarction (3 recruiting studies) |
| 55. | Cerebral Palsy (7 recruiting studies) |
| 56. | Cerebrovascular Accident (62 recruiting studies) |
| 57. | Cerebrovascular Disorders (60 recruiting studies) |
| 58. | Chorea (4 recruiting studies) |
| 59. | Chorea Minor (1 recruiting study) |
| 60. | Choreatic Disorders (4 recruiting studies) |
| 61. | Choroid Plexus Neoplasms (16 recruiting studies) |
| 62. | Chronobiology Disorders (2 recruiting studies) |
| 63. | Cockayne Syndrome (1 recruiting study) |
| 64. | Communication Disorders (14 recruiting studies) |
| 65. | Complex Regional Pain Syndromes (2 recruiting studies) |
| 66. | Convulsions (19 recruiting studies) |
| 67. | Cranial Nerve Diseases (15 recruiting studies) |
| 68. | Cranial Nerve Neoplasms (7 recruiting studies) |
| 69. | Craniocerebral Trauma (13 recruiting studies) |
| 70. | Deafness (3 recruiting studies) |
| 71. | Delirium (63 recruiting studies) |
| 72. | Dementia (68 recruiting studies) |
| 73. | Demyelinating Autoimmune Diseases, CNS (18 recruiting studies) |
| 74. | Demyelinating Diseases (22 recruiting studies) |
| 75. | Dermatomyositis (7 recruiting studies) |
| 76. | Diabetic Neuropathies (4 recruiting studies) |
| 77. | Disorders of Excessive Somnolence (4 recruiting studies) |
| 78. | Down Syndrome (2 recruiting studies) |
| 79. | Dysarthria (2 recruiting studies) |
| 80. | Dyskinesia, Drug-Induced (1 recruiting study) |
| 81. | Dyskinesias (13 recruiting studies) |
| 82. | Dyslexia (4 recruiting studies) |
| 83. | Dyslexia, Acquired (1 recruiting study) |
| 84. | Dyssomnias (19 recruiting studies) |
| 85. | Dystonia (11 recruiting studies) |
| 86. | Dystonic Disorders (11 recruiting studies) |
| 87. | Encephalitis (6 recruiting studies) |
| 88. | Encephalitis, Arbovirus (2 recruiting studies) |
| 89. | Encephalitis, Herpes Simplex (1 recruiting study) |
| 90. | Encephalitis, Viral (3 recruiting studies) |
| 91. | Encephalomalacia (1 recruiting study) |
| 92. | Encephalomyelitis (1 recruiting study) |
| 93. | Epilepsies, Partial (3 recruiting studies) |
| 94. | Epilepsy (29 recruiting studies) |
| 95. | Epilepsy, Absence (2 recruiting studies) |
| 96. | Epilepsy, Frontal Lobe (1 recruiting study) |
| 97. | Epilepsy, Generalized (2 recruiting studies) |
| 98. | Epilepsy, Temporal Lobe (3 recruiting studies) |
| 99. | Epilepsy, Tonic-Clonic (1 recruiting study) |
| 100. | Essential Tremor (4 recruiting studies) |
| 101. | Esthesioneuroblastoma, Olfactory (13 recruiting studies) |
| 102. | Fabry Disease (5 recruiting studies) |
| 103. | Facial Pain (3 recruiting studies) |
| 104. | Facial Paralysis (1 recruiting study) |
| 105. | Familial Mediterranean Fever (1 recruiting study) |
| 106. | Fatigue Syndrome, Chronic (1 recruiting study) |
| 107. | Fibromyalgia (10 recruiting studies) |
| 108. | Fragile X Syndrome (1 recruiting study) |
| 109. | Friedreich Ataxia (2 recruiting studies) |
| 110. | Fucosidosis (1 recruiting study) |
| 111. | Gangliosidoses (1 recruiting study) |
| 112. | Gangliosidosis GM1 (1 recruiting study) |
| 113. | Gaucher Disease (7 recruiting studies) |
| 114. | Glycogen Storage Disease Type II (1 recruiting study) |
| 115. | Guillain-Barre Syndrome (1 recruiting study) |
| 116. | Hallucinations (4 recruiting studies) |
| 117. | Head Injuries, Closed (2 recruiting studies) |
| 118. | Headache (2 recruiting studies) |
| 119. | Headache Disorders (2 recruiting studies) |
| 120. | Hearing Disorders (7 recruiting studies) |
| 121. | Hearing Loss (7 recruiting studies) |
| 122. | Hemiplegia (7 recruiting studies) |
| 123. | Hereditary Central Nervous System Demyelinating Diseases (2 recruiting studies) |
| 124. | Hippel-Lindau Disease (9 recruiting studies) |
| 125. | Holoprosencephaly (1 recruiting study) |
| 126. | Huntington Disease (4 recruiting studies) |
| 127. | Hydrocephalus (1 recruiting study) |
| 128. | Hyperalgesia (2 recruiting studies) |
| 129. | Hyperkinesis (13 recruiting studies) |
| 130. | Hyperpituitarism (5 recruiting studies) |
| 131. | Hypopituitarism (2 recruiting studies) |
| 132. | Hypothalamic Diseases (14 recruiting studies) |
| 133. | Hypothalamic Neoplasms (4 recruiting studies) |
| 134. | Hypoxia, Brain (5 recruiting studies) |
| 135. | Hypoxia-Ischemia, Brain (5 recruiting studies) |
| 136. | Infratentorial Neoplasms (1 recruiting study) |
| 137. | Intracranial Aneurysm (1 recruiting study) |
| 138. | Intracranial Arterial Diseases (1 recruiting study) |
| 139. | Intracranial Hemorrhages (4 recruiting studies) |
| 140. | Intracranial Hypertension (2 recruiting studies) |
| 141. | Isaacs Syndrome (1 recruiting study) |
| 142. | Ischemic Attack, Transient (3 recruiting studies) |
| 143. | Kugelberg-Welander Syndrome (1 recruiting study) |
| 144. | Language Development Disorders (1 recruiting study) |
| 145. | Language Disorders (14 recruiting studies) |
| 146. | Learning Disorders (3 recruiting studies) |
| 147. | Leukodystrophy, Globoid Cell (1 recruiting study) |
| 148. | Leukodystrophy, Metachromatic (1 recruiting study) |
| 149. | Leukomalacia, Periventricular (1 recruiting study) |
| 150. | Lissencephaly (1 recruiting study) |
| 151. | Low Back Pain (6 recruiting studies) |
| 152. | Lyme Neuroborreliosis (1 recruiting study) |
| 153. | Lysosomal Storage Diseases, Nervous System (13 recruiting studies) |
| 154. | Median Neuropathy (2 recruiting studies) |
| 155. | MELAS Syndrome (1 recruiting study) |
| 156. | Memory Disorders (7 recruiting studies) |
| 157. | Meningeal Neoplasms (12 recruiting studies) |
| 158. | Meningioma (22 recruiting studies) |
| 159. | Meningitis (5 recruiting studies) |
| 160. | Meningoencephalitis (1 recruiting study) |
| 161. | Meningomyelocele (1 recruiting study) |
| 162. | Menkes Kinky Hair Syndrome (1 recruiting study) |
| 163. | Mental Retardation (14 recruiting studies) |
| 164. | Mental Retardation, X-Linked (5 recruiting studies) |
| 165. | Migraine (3 recruiting studies) |
| 166. | Mitochondrial Encephalomyopathies (1 recruiting study) |
| 167. | Mitochondrial Myopathies (1 recruiting study) |
| 168. | Mononeuropathies (4 recruiting studies) |
| 169. | Motor Neuron Disease (16 recruiting studies) |
| 170. | Movement Disorders (66 recruiting studies) |
| 171. | Mucolipidoses (1 recruiting study) |
| 172. | Multiple Sclerosis (19 recruiting studies) |
| 173. | Multiple Sclerosis, Chronic Progressive (2 recruiting studies) |
| 174. | Multiple Sclerosis, Relapsing-Remitting (4 recruiting studies) |
| 175. | Multiple System Atrophy (3 recruiting studies) |
| 176. | Muscle Cramp (7 recruiting studies) |
| 177. | Muscle Hypertonia (1 recruiting study) |
| 178. | Muscle Hypotonia (1 recruiting study) |
| 179. | Muscle Rigidity (1 recruiting study) |
| 180. | Muscle Spasticity (4 recruiting studies) |
| 181. | Muscle Weakness (4 recruiting studies) |
| 182. | Muscular Atrophy (4 recruiting studies) |
| 183. | Muscular Atrophy, Spinal (3 recruiting studies) |
| 184. | Muscular Diseases (47 recruiting studies) |
| 185. | Muscular Disorders, Atrophic (7 recruiting studies) |
| 186. | Muscular Dystrophies (5 recruiting studies) |
| 187. | Muscular Dystrophy, Duchenne (2 recruiting studies) |
| 188. | Muscular Dystrophy, Facioscapulohumeral (1 recruiting study) |
| 189. | Mutism (1 recruiting study) |
| 190. | Myasthenia Gravis (1 recruiting study) |
| 191. | Myelitis (8 recruiting studies) |
| 192. | Myelodysplasia (172 recruiting studies) |
| 193. | Myoclonus (3 recruiting studies) |
| 194. | Myositis (11 recruiting studies) |
| 195. | Myositis, Inclusion Body (3 recruiting studies) |
| 196. | Myotonic Disorders (1 recruiting study) |
| 197. | Myotonic Dystrophy (1 recruiting study) |
| 198. | Narcolepsy (3 recruiting studies) |
| 199. | Neck Pain (4 recruiting studies) |
| 200. | Nerve Compression Syndromes (2 recruiting studies) |
| 201. | Nerve Sheath Tumors (6 recruiting studies) |
| 202. | Nervous System Diseases (568 recruiting studies) |
| 203. | Nervous System Malformations (8 recruiting studies) |
| 204. | Nervous System Neoplasms (105 recruiting studies) |
| 205. | Neural Tube Defects (5 recruiting studies) |
| 206. | Neuralgia (4 recruiting studies) |
| 207. | Neurilemmoma (2 recruiting studies) |
| 208. | Neuritis (1 recruiting study) |
| 209. | Neurobehavioral Manifestations (36 recruiting studies) |
| 210. | Neurocutaneous Syndromes (16 recruiting studies) |
| 211. | Neurodegenerative Diseases (125 recruiting studies) |
| 212. | Neurofibroma (6 recruiting studies) |
| 213. | Neurofibroma, Plexiform (3 recruiting studies) |
| 214. | Neurofibromatoses (7 recruiting studies) |
| 215. | Neurofibromatosis 1 (4 recruiting studies) |
| 216. | Neurofibromatosis 2 (3 recruiting studies) |
| 217. | Neurofibrosarcoma (10 recruiting studies) |
| 218. | Neurologic Manifestations (122 recruiting studies) |
| 219. | Neuroma, Acoustic (2 recruiting studies) |
| 220. | Neuromuscular Diseases (67 recruiting studies) |
| 221. | Neuromuscular Junction Diseases (2 recruiting studies) |
| 222. | Neuromuscular Manifestations (4 recruiting studies) |
| 223. | Neuronal Ceroid-Lipofuscinosis (1 recruiting study) |
| 224. | Neurotoxicity Syndromes (11 recruiting studies) |
| 225. | Niemann-Pick Diseases (1 recruiting study) |
| 226. | Nonsyndromic Hereditary Hearing Impairment (1 recruiting study) |
| 227. | Nystagmus, Pathologic (2 recruiting studies) |
| 228. | Ocular Motility Disorders (4 recruiting studies) |
| 229. | Ophthalmoplegia (1 recruiting study) |
| 230. | Optic Nerve Diseases (8 recruiting studies) |
| 231. | Optic Nerve Glioma (5 recruiting studies) |
| 232. | Optic Nerve Neoplasms (5 recruiting studies) |
| 233. | Optic Neuritis (1 recruiting study) |
| 234. | Pain (90 recruiting studies) |
| 235. | Papilledema (3 recruiting studies) |
| 236. | Paralysis (19 recruiting studies) |
| 237. | Paraparesis (3 recruiting studies) |
| 238. | Paraparesis, Spastic (3 recruiting studies) |
| 239. | Paraparesis, Tropical Spastic (2 recruiting studies) |
| 240. | Paraplegia (3 recruiting studies) |
| 241. | Parasomnias (2 recruiting studies) |
| 242. | Paresis (2 recruiting studies) |
| 243. | Paresthesia (1 recruiting study) |
| 244. | Parkinson Disease (37 recruiting studies) |
| 245. | Parkinsonian Disorders (34 recruiting studies) |
| 246. | Perceptual Disorders (4 recruiting studies) |
| 247. | Peripheral Nervous System Diseases (23 recruiting studies) |
| 248. | Peripheral Nervous System Neoplasms (9 recruiting studies) |
| 249. | Peroxisomal Disorders (3 recruiting studies) |
| 250. | Pick Disease of the Brain (4 recruiting studies) |
| 251. | Pituitary Diseases (11 recruiting studies) |
| 252. | Pituitary Neoplasms (6 recruiting studies) |
| 253. | Poliomyelitis (3 recruiting studies) |
| 254. | Polymyositis (7 recruiting studies) |
| 255. | Polyneuropathies (3 recruiting studies) |
| 256. | Polyradiculoneuropathy (2 recruiting studies) |
| 257. | Polyradiculopathy (1 recruiting study) |
| 258. | Porencephaly (1 recruiting study) |
| 259. | Postpoliomyelitis Syndrome (3 recruiting studies) |
| 260. | Prader-Willi Syndrome (1 recruiting study) |
| 261. | Pseudotumor Cerebri (1 recruiting study) |
| 262. | Psychomotor Agitation (8 recruiting studies) |
| 263. | Psychomotor Disorders (2 recruiting studies) |
| 264. | Quadriplegia (3 recruiting studies) |
| 265. | Radiculopathy (1 recruiting study) |
| 266. | Reflex Sympathetic Dystrophy (2 recruiting studies) |
| 267. | Refsum Disease (1 recruiting study) |
| 268. | Restless Legs Syndrome (3 recruiting studies) |
| 269. | Rett Syndrome (1 recruiting study) |
| 270. | Sciatic Neuropathy (2 recruiting studies) |
| 271. | Sciatica (2 recruiting studies) |
| 272. | Seizures (19 recruiting studies) |
| 273. | Sensation Disorders (14 recruiting studies) |
| 274. | Shy-Drager Syndrome (1 recruiting study) |
| 275. | Sleep Apnea Syndromes (10 recruiting studies) |
| 276. | Sleep Apnea, Obstructive (5 recruiting studies) |
| 277. | Sleep Deprivation (4 recruiting studies) |
| 278. | Sleep Disorders (21 recruiting studies) |
| 279. | Sleep Disorders, Circadian Rhythm (2 recruiting studies) |
| 280. | Sleep Disorders, Intrinsic (19 recruiting studies) |
| 281. | Sleep Initiation and Maintenance Disorders (5 recruiting studies) |
| 282. | Somatosensory Disorders (2 recruiting studies) |
| 283. | Spasm (1 recruiting study) |
| 284. | Spasmodic Dysphonia (6 recruiting studies) |
| 285. | Spastic Dysphonia (6 recruiting studies) |
| 286. | Speech Disorders (8 recruiting studies) |
| 287. | Sphingolipidoses (14 recruiting studies) |
| 288. | Spinal Cord Diseases (33 recruiting studies) |
| 289. | Spinal Cord Injuries (10 recruiting studies) |
| 290. | Spinal Cord Neoplasms (7 recruiting studies) |
| 291. | Spinal Dysraphism (2 recruiting studies) |
| 292. | Spinocerebellar Degenerations (4 recruiting studies) |
| 293. | Stiff-Person Syndrome (2 recruiting studies) |
| 294. | Strabismus (3 recruiting studies) |
| 295. | Sturge-Weber Syndrome (16 recruiting studies) |
| 296. | Stuttering (6 recruiting studies) |
| 297. | Subarachnoid Hemorrhage (2 recruiting studies) |
| 298. | Supranuclear Palsy, Progressive (2 recruiting studies) |
| 299. | Supratentorial Neoplasms (4 recruiting studies) |
| 300. | Syncope (1 recruiting study) |
| 301. | Syringomyelia (3 recruiting studies) |
| 302. | Taste Disorders (1 recruiting study) |
| 303. | Tauopathies (46 recruiting studies) |
| 304. | Temporal Arteritis (1 recruiting study) |
| 305. | Tic Disorders (12 recruiting studies) |
| 306. | Tics (12 recruiting studies) |
| 307. | Tinnitus (1 recruiting study) |
| 308. | Torticollis (3 recruiting studies) |
| 309. | Tourette Syndrome (11 recruiting studies) |
| 310. | Trauma, Nervous System (22 recruiting studies) |
| 311. | Tremor (7 recruiting studies) |
| 312. | Trigeminal Nerve Diseases (1 recruiting study) |
| 313. | Trigeminal Neuralgia (1 recruiting study) |
| 314. | Tuberous Sclerosis (3 recruiting studies) |
| 315. | Tyrosinemias (1 recruiting study) |
| 316. | Vagus Nerve Diseases (1 recruiting study) |
| 317. | Vascular Headaches (2 recruiting studies) |
| 318. | Vasculitis, Central Nervous System (1 recruiting study) |
| 319. | Vestibulocochlear Nerve Diseases (2 recruiting studies) |
| 320. | Vision Disorders (4 recruiting studies) |
| 321. | Vocal Cord Paralysis (1 recruiting study) |
| 322. | Voice Disorders (7 recruiting studies) |
| 323. | West Nile Fever (2 recruiting studies) |
| 324. | Zellweger Syndrome (1 recruiting study) |
