Anosmia ( --> Olfaction Disorders) - An inability to detect odours; this may also dull the sense of taste.

Aphasia - Also called DYSPHASIA, brain-generated defect in sounding words. Symptoms are associated with the location and extent of the brain tissues involved. An afflicted person, for example, although able to move his mouth parts and utter sounds and able to understand spoken words, may be totally unable to form words himself.

Apraxias - Disturbance, caused by cerebral lesion, in the ability to carry out useful or skilled acts; motor power and mental capacity remain intact.

Brown-Sequard Syndrome  ( --> Paralysis)

Cerebellar Ataxia 

Chorea - Neurological disorder characterized by irregular, involuntary, and purposeless movements of muscle groups in various parts of the body.

Coma ( --> Unconsciousness) - Complete lack of consciousness, characterized by loss of reaction to external stimuli and absence of spontaneous nervous activity, usually associated with diffuse injury to the cerebrum. Unconsciousness may accompany a number of metabolic disorders or physical injuries to the brain from disease or trauma.

Communication Disorders - Speech disorder

Convulsions ( --> Seizures) - Pathological body condition characterized by abnormal, violent, and uncontrolled spasmodic contractions and relaxations of the voluntary muscles, taking the form of a fit. Convulsions may be a symptom resulting from various diseases.

Dizziness - Having or involving a sensation of spinning around and losing one's balance.

Dystonia - These sustained muscular contractions, which produce abnormal postures of the face, head, trunk, and limbs, are caused by disease of the basal ganglia.

Erb's Palsy - Erb's paralysis, with weakness of the arm and shoulder because of damage to the fifth and sixth cervical nerves.

Fasciculation - These are brief, irregular, involuntary twitches of muscles that do not lead to the movement of a joint but that are visible and can be felt by the patient. 

Headache - Pain in the upper portion of the head. 

Hemiplegia - Paralysis of one side of the body caused by injury to the corticospinal (pyramidal) tracts of the central nervous system.

Isaac's Syndrome ( --> Fasciculation) - A brief spontaneous contraction affecting a small number of muscle fibres, often causing a flicker of movement under the skin. It can be a symptom of disease of the motor neurons.

Memory Disorders - Any of the disorders that affect the ability to remember.

Mental Retardation - Any of several conditions characterized by subnormal intellectual functioning and impaired adaptive behaviour that become manifest during the individual's developmental years.

Moebius Syndrome( --> Paralysis) - In Moebius' syndrome, the abducens and facial nerves, which originate in the brain stem, may not develop from birth.

Mutism - Inability to speak, typically as a result of congenital deafness or brain damage.

Myoclonus - Spasmodic jerky contraction of groups of muscles.

Olfaction Disorders - The action or capacity of smelling; the sense of smell.

Pain - Physical suffering or discomfort caused by illness or injury

Paralysis - Also called Palsy, loss or impairment of voluntary muscular power.

Paraplegia( --> Paralysis) - Paralysis of the legs and lower part of the body. Often it involves loss of sensation (of pain, temperature, vibration, and position) as well as loss of motion.

Phantom Limb (respect to its structure, functions, and abnormalities) - "pain" in the toes of a missing foot.

Seizures - A sudden attack of illness, especially a stroke or an epileptic fit.

Spasm - A sudden involuntary muscular contraction or convulsive movement. A sudden and brief spell of an activity or sensation.

Spasmodic Torticollis  (--> Dystonia) - It is a specific disorder in which the muscles of one side of the neck contract spasmodically.

Speech Disorders - Any of the disorders that impair human speech.

Syncope ( --> Unconsciousness) - Effect of temporary impairment of blood circulation to a part of the body. The term is most often used as a synonym for fainting, which is caused by insufficient blood flow to the brain as a result of a fall in blood pressure.

Torticollis - Also called WRYNECK, OR STIFF NECK, abnormality in which the head is pulled to one side and twisted so that the chin points to the other side.

Tremor - An involuntary quivering movement: a disorder that causes tremors and muscle rigidity.

Trismus ( --> Spasm) - Spasm of the jaw muscles, causing the mouth to remain tightly closed, typically as a symptom of tetanus. Also called lockjaw.

Unconsciousness

Vertigo - A sensation of whirling and loss of balance, associated particularly with looking down from a great height, or caused by disease affecting the inner ear or the vestibular nerve; giddiness.