A motor action is a result of an interaction between cognitive, motor, and sensory processes. Volitional actions, in turn, arise schematically from a completed motor sequence. If, for example, paralysis occurs in a person or if his movements are uncontrolled, the voluntary motor action is disturbed. This is not due to damaged muscles, but to … Volitional Motor Function: Function, Tasks, Role & Diseases
Chorea minor, also known as Sydenham’s chorea, is a neurologic autoimmune disorder that usually occurs a few weeks after an infection with group A ß-hemolytic streptococci. The disease is usually a late manifestation of rheumatic fever. What is chorea minor? Chorea always results from impairment of the basal ganglia. Typical of chorea are involuntary and … Chorea Minor: Causes, Symptoms & Treatment
The stylohyoid muscle is a small skeletal muscle in the jaw region. It is part of the suprahyoid musculature and contributes to swallowing and opening the jaw. Dysphagia can also affect the stylohyoid muscle and lead to functional impairment. What is the stylohyoid muscle? The stylohyoid muscle is a striated muscle involved in opening the … Stylohyoid Muscle: Structure, Function & Diseases
Neurology represents one of the most multifaceted, fascinating specialties in medicine. In addition to diseases such as multiple sclerosis, Alzheimer’s disease and the universally known stroke, spinocerebellar ataxias are also of immense importance. These are the generic term for a wide variety of disorders in the coordination of movements. The loss of nerve cells leads … Spinocerebellar Ataxia: Causes, Symptoms & Treatment
Chromosomal mutations are changes to one or more chromosomes in an individual. These changes can be passed on to descendants. A consequence of such mutations may be disease, malformation, or disability. What are chromosomal mutations? Various changes are possible on a chromosome. This is because chromosomes can break apart, resulting in mutations. There are seven … Chromosomal Mutation: Causes, Symptoms & Treatment
The human brain is undoubtedly one of the most complex organs of all and can be affected by a wide range of diseases. Since it forms the body’s central nervous system (CNS) along with the spinal cord, brain diseases usually not only affect localized brain structures and functions, but this is automatically associated with far-reaching … Brain Diseases: Causes, Symptoms & Treatment
The input area of the basal ganglia is the striatum, also known as the striate body. This part of the brain is interconnected with the motor neural pathways and is the first switching point for the circuitry of specific movements. Degeneration of the striatum can occur in the context of Parkinson’s disease or Huntington’s disease … Striatum: Structure, Function & Diseases
