The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of the nerve fibers that branch off from the spinal cord and extend to all parts of the body, including the neck and arms, torso, legs, skeletal muscles and internal organs.Apr 30, 2017
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction.
The nervous system of vertebrates (including humans) is divided into the central nervous system (CNS) and the peripheral nervous system (PNS). The (CNS) is the major division, and consists of the brain and the spinal cord. The spinal canal contains the spinal cord, while the cranial cavity contains the brain.
Disorders of the nervous system may involve the following:Vascular disorders, such as stroke, transient ischemic attack (TIA), subarachnoid hemorrhage, subdural hemorrhage and hematoma, and extradural hemorrhage.Infections, such as meningitis, encephalitis, polio, and epidural abscess.More items...
Nervous System DisordersGuillain-Barré Syndrome.Epilepsy and Seizures.Brain Tumors.Bell's Palsy.Bell's Palsy.Alzheimer's Disease.Amyotrophic Lateral Sclerosis (ALS)Acute Spinal Cord Injury.More items...
So, if some die through illness or damage, the nervous system can permanently lose some of its abilities. The symptoms of disorders of the nervous system depend on which part is attacked - Alzheimer's disease destroys cells in the memory area of the brain, for example.
Many forms of brain and spinal cord (CNS) damage cut axons. Where axons can regenerate, as in peripheral nerves, they can bring back function. However in the CNS axon regeneration fails. This is the main reason why paralysis and loss of sensation is permanent in conditions such as spinal cord injury.
Damage can occur to nerves in your brain and spinal cord. It can also occur in the peripheral nerves, which are located throughout the rest of your body. Autonomic nerve damage may produce the following symptoms: Inability to sense chest pain, such as angina or heart attack.Jul 30, 2016