freezing of movements

anxiety, depression, difficulty sleeping, irritability

Post-traumatic stress disorder (PTSD) is a term for certain severe psychological consequences of exposure to, or confrontation with, stressful events that the person experiences as highly traumatic. Clinically, such events involve actual or threatened death, serious physical injury, or a threat to physical and/or psychological integrity, to a degree that usual psychological defenses are incapable of coping with the impact. 

behavioral changes, confusion, depression, hallucinations

Psychosis is a generic psychiatric term for a mental state often described as involving a "loss of contact with reality". Stedman's Medical Dictionary defines psychosis as "a severe mental disorder, with or without organic damage, characterized by derangement of personality and loss of contact with reality and causing deterioration of normal social functioning. 

abnormal gait, eye pain, pain in neck, slurred speech

change in cognition, convulsions, passed out but now well, passing out

Absence seizures are one of several kinds of seizures. These seizures are sometimes referred to as petit mal seizures, which is an older term. ... 

cognitive defect, convulsions, passed out but now well, passing out

Juvenile myoclonic epilepsy (JME), also known as Janz syndrome, is a fairly common form of idiopathic generalized epilepsy affecting up to 10% of the population. This disorder typically first manifests itself between the ages of 12 and 18 with myoclonus occurring early in the morning. 

behavioral changes, confusion, hallucinations, regression of behavior

Schizophrenia (from the Greek word σχιζοφρένεια, or schizophreneia, meaning "split mind") is a psychiatric diagnosis that describes a mental disorder characterized by impairments in the perception or expression of reality and by significant social or occupational dysfunction. 

abnormal gait, limited leg movements, poor coordination, tremor

abnormal gait, difficulty breathing, muscle weakness in leg(s), weakness

Amyotrophic lateral sclerosis (ALS, sometimes called Lou Gehrig's disease, Maladie de Charcot or motor neurone disease) is a progressive, fatal neurodegenerative disease caused by the degeneration of motor neurons. 

abnormal gait, change in cognition, difficulty speaking, slurred speech

Huntington's disease (HD), also known as Huntington disease and previously as Huntington's chorea and chorea maior, is a rare inherited neurological disorder affecting up to 8 people per 100,000. It takes its name from the Ohio physician George Huntington who described it precisely in 1872 in his first medical paper. 

behavioral changes, cognitive defect, difficulty speaking, slurred speech

Neurodegeneration with brain iron accumulation (NBIA) is a rare, inherited, neurological movement disorder characterized by progressive degeneration of the nervous system. Symptoms, which vary greatly among patients and usually develop during childhood, may include slow writhing, distorting muscle contractions of the limbs, face, or trunk, choreoathetosis (involuntary, purposeless jerky muscle movements), muscle rigidity (uncontrolled tightness of the muscles), spasticity (sudden, involuntary muscle spasms), ataxia (inability to coordinate movements), confusion, disorientation, seizures, stupor, and dementia.