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Comp Med Term
Chapter 8 - Nervous System
Term | Definition |
---|---|
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 |
Cerebrum | LARGEST, uppermost part of brain; controls CONSCIOUSNESS, MEMORY, SENSATIONS, EMOTIONS and VOLUNTARY MOVEMENT |
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 |