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Med term 17
| Term | Definition |
|---|---|
| Spinal nerves | 31 pairs of nerves connected to spinal cord |
| Amyloid | Starch like substance the accumulates in the Alzhiemers brain |
| Myelin | White fatty material that covers some axons and speeds elextricate conduction |
| Neuron | Nerve cell that allows communication between body parts |
| Hydrocephalus | Excess CSF in the brain |
| Multiple sclerosis | Loss of myelin, sclerosis of central nervous tissue |
| Parkinsinism | Neurons don't secrete dopamine. Characterized by tremors, muscle rigitidy, akinesia, and emotional problems |
| Axon | Carries impulses away from the cell body |
| Dendrite | Carries impulses toward the cell body |
| Brain stem | Connects the brain and spinal cord; consists of the midbrain, pons, and medulla oblongata |
| Diencephalon | Contains thalamus, hypothalamus and the pituitary gland |
| Ganglion | Collection of cell bodies along a nerve pathway |
| Cerebellum | In charge of voluntary muscle movements, posture, coordination, and balance |
| Cerebrospinal fluid | Csf; made in ventricles of the brain, circulates around the brain protecting and cushioning |
| Reflex | Simple autonomic response that requires few neurons |
| Arachnoid mater | Middle web like layer of the meninges |
| Pia mater | Thin vascular inner layer of the meninges attached to the brain and spinal cord |
| Dura mater | Thick tough outer layer of the meninges |
| Cortic/o | Cerebral cortex, outer portion |
| Autonomic nervous system | Controls smooth muscle, cardiac muscle, and glands. Responsible for automatic responses and responses to stress. Sympathetic and parasympathetic |
| Neuroglia | Supports and protects nervous tissue |
| Traumatic brain injury | Cuncussion that damages the brain |
| Somatic nervous system | Controls skeletal muscles |
| Peripheral nervous system | Consists of nervous tissue outside the brain and the spinal cord. 12 pairs of cranial nerves and 31 pairs of spinal/peripheral nerves |
| Cerebrum | Responsible for memory, reasoning, and abstract thinking |
| Myelinated tissue | White matter of the nervous system |
| Nerve | Bundles of neurons |
| Cerebral cortex | |
| Neurotransmitter | Chemical that transmits energy through a synapse |
| Unmyelinated tissue | Gray matter of nervous tissue |
| Anuerism | Weakening or dilation of a vessel in the brain. Effects of burst: paralysis, hemiplegia, hemiparesis, aphasia |
| Synapse | Point of contact between neurons |
| Radicul/o | Spinal nerve root |
| Gli/o | Neuroglia |
| Neur/o | Nervous system, nervous tissue, nerve |
| Mening/o | Meninges |
| Spinal reflex | Impulses do not go to the brain |
| Cerebrovascular accident | Brain is deprived of oxygen due to occlusion in the vessels |
| Cerebroangiography | Radiographic image of brain |
| Signs of stroke | F-face drooping A-arms droopy/weakness S-speech slurred or confused T-time to call 911 |
| Glioma | Tumors of nonconducting support cell |
| Lepsy | Seizure |
| Motor (efferent) neuron | Carries impulses away from the CNS |
| Sensory (afferent) neuron | Carries impulses toward CNS |
| Dopamine | Responsible for mood and thought disorders, involuntary movement |
| Parasympathetic | Returns body to normal, calms down after stress |
| Sympathetic | Fight or flight; raises HR and respiration, stops digestion |
| Astrocytoma | Tumor composed of astrocytes |
| Central nervous system | Brain and spinal cord |
| Epilepsy | Abnormal electrical activity in the brain |
| Gyri | Raised areas of the brain |
| Sulci | Grooves in the cerebral cortex |
| Serotonin | Plays roles in sleep, hunger, and pleasure recognition |
| Endorphin | Body's natural high, relieves pain |