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Comp Med Term

Chapter 8 - Nervous System

Arachnoid web-like, MIDDLE layer of meninges surrounding brain and spinal cord
Brain stem stem-like portion of the brain that connects cerebral hemispheres with spinal cord
Cerebullum responsible for coordinating voluntary MUSCULAR movement; located behind the brain stem
Diencephalon Contain THALAMUS, HYPOTHALAMUS and Pineal Glands; located between the Cerebrum and Mid-brain
Dura Mater OUTERMOST layer meninges surrounding brain and spinal cord
Medulla Oblongata One of three parts of brain stem. Contains CARDIAC, VASOMOTOR & RESPIRATORY centers of the brain.
Hypothalamus controls body TEMPERATURE, SLEEP & APPETITE
Pons acts as a BRIDGE to connect Medulla Oblongata & Cerebellum to upper portion of the brain
Ventricle small hollow within brain; filled with cerebrospinal fluid
Hydrocephalus congenital, abnormal increase of cerebrospinal fluid in brain that causes ventricles of brain to dilate; large head size
Fissure deep groove in surface of an organ
Coma deep sleep
Syncope fainting; temporary loss of consciousness caused by a fall in blood pressure
Neuritis inflammation of a nerve
Hemiparesis slight or partial paralysis of half the body-right or left side
Peripheral Nervous System (PNS) 12 prs. cranial nerves; 31 prs. spinal nerves; responsible for TRANSMITTING sensory and motor IMPULSES back and forth between CNS and rest of the body
Central Nervous System (CNS) brain and spinal cord; PROCESSING & STORING sensory and motor information and for controlling consciousness.
Aphasia without speech; inability to speak
Neurology the study of the nervous system and related disorders and diseases
Cerebral Palsy congenital brain damage, permanent not progressive. Lack of voluntary muscle control
Paraplegia paralysis of LOWER extremities, usually due to spinal cord injury
Migrane recurring, pulsating, vascular headache usually developing on one side of the head, preceded by aura - sensory disturbance
Epilepsy recurring episodes of irregular brain activity; causes SEIZURES
Encephalitis INFLAMMATION of the brian
Cephalagia Headache; pain in the head
Alzheimer's deterioration of a person's INTELLECTUAL functioning; progressive & debilitating, more common in ages 65 or older
Cerebrospinal Fluid (CSF) fluid flowing through brain & around spinal cord, protects them from physical blow or impact; SHOCK ABSORBERS
Transient Ischemic Attacks (TIA) mini-stroke; decreased blood supply to the brain; usually lasting only a few minutes and causing no permanent damage
Autonomic Nervous System (ANS) regulates involuntary vital functions such as the heart muscle, smooth muscles and the glands; two divisions - sympathetic & parasympathetic nerves
Cerebrovascular Accident (CVA) Stroke; blood supply to is interrupted or reduced, depriving brain tissue of oxygen and nutrients
Rapid Eye Movement (REM) sleep that occurs at intervals during the night and is characterized by rapid eye movements, more dreaming and bodily movement, and faster pulse and breathing
Ischemia Inadequate blood supply to a local area (usually brain or heart) due to blockage of blood vessels leading to that area
Afferent nerves SENSORY NERVES; transmitters of nerve impulses toward CNS
Efferent nerves MOTOR NERVES; transmitters of nerve impulses away from CNS
Myelin Sheath protective sheath that covers axons of nerves; axon BLANKET
Meninges 3 layers of protective MEMBRANES that surround brain & spinal cord
Aneurysm localized dilation in the wall of an artery that expands with each pulsation of the artery; usually caused by hypertension or atherosclerosis
Craniotomy a surgical INCISION into cranium or skull
Cerebral Concussion brief interruption of brain function; usually with brief loss of consciousness; a transient loss of consciousness usually caused by blunt trauma (blow) to the head
Neurologist a physician who specializes in treating diseases & disorders of the nervous system
Paresthesia sensation of NUMBNESS or TINGLING
Occlusion BLOCKAGE
Palliative SOOTHING
Hemiparesis slight or partial paralysis of one half of the body
Created by: madmomma63