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Nervous System
Question | Answer |
---|---|
Olfactory | sense of smell |
Optic | vision |
Oculomotor | movement of eyes and eyelids |
Trochlear | movement of eyes |
Trigeminal | mastication |
Abduces | eye movement |
Facial | facial expressions |
Vestibulocochlear | hearing and equilibrium |
Glossopharyngeal | swallowing and taste |
Vagus | autonomic motor |
Accessory | sternocleidomastoid |
Hypoglossal | tongue |
Alzheimer disease | progressive dementia |
Bell Palsy | one side of the face |
Cerebrovascular accident (CVA) | most common brain disorder |
Shingles | caused by varicella-zoster virus |
Parkinson Disease | tremors |
Meningitis | acute inflammation |
Hydrocephalus | obstruction in the normal flow of cerebrospinal fluid |
Nervous system | CNS and PNS |
Ganglia | knots of nerve call bodies |
Afferent Division (sensory) | transmits impulses from peripheral organs to the CNS |
Efferent Division (motor) | transmits impulses from the CNS out to the peripheral organs to cause an effect or action |
Neuron | transmits impulses |
Neuroglia | nerve glue, no nerve impulses , it supports, nourish, and protect |
Three parts of the neurons | cell body, one or more dendrites, and a single axon |
Myelin Sheath | white, fatty substance that surrounds an axon |
Grey Matter | Unmyelinated fibers |
Nodes of Ranvier | unmyelinated regions between the myelin segments |
Schwann cells | in the PNS this produces myelin |
Neurilemma | covering of schwann cells , plays a role in regeneration of nerve fibers |
Oligodrendrocytes | In the CNS this produces Myelin |
Synapse | communication between two neurons |
Neurotransmitter | chemical |
Reflex | an automatic involuntary response to some change, coughing, sneezing, and reaction to painful stimuli |
CNS consists of | brain and spinal cord |
Meninges Three Layers | Dura Mater, Arachnoid, and Pia Mater |
Dura Mater characteristics | though, white fibrous connective tissue |
Arachnoid | resembles cobwebs |
Subarachnoid | space filled with CSF and contains blood vessels |
Pia Mater | tightly bound to the surface of the brain and spinal cord |
Cerebrum | largest portion of the brain |
Longitudinal fissure | divides the brain into two cerebral hemisphere |
Corpus Callosum | arching band of white fibers |
Cerebral cortex | outer region of cerebrum, its grey matter makes us HUMAN |
White Matter | Myelinated nerve fibers that form communication pathways in the cerebrum |
Diencephalon | Thalamus, Hypothalamus, and Pineal gland |
Thalamus | channels impulses in cortex, discrimination, localization, and interpretation |
Hypothalamus | homeostasis; regulates many visceral activities |
Pineal gland | puberty , biological clock |
Brain Stems three parts | Midbrain, Pons, and Medulla Oblangata |
Medulla Oblangata 3 Vital centers | Cardiac center, Vasomotor center, Respiratory center |
Cardiac center | heart rate |
Vasomotor center | blood pressure |
Respiratory center | regulates rate, rhythm, and depth of breathing |
Cerebellum | coordination, posture, and balance the motor area of the brain |
Ventricles | fluid-filled cavities in the brain |
Spinal cord | extends from the foramen magnum at base of skull to the first lumbar |
Ascending tracts | pathways that carry sensory impulses from body parts to the brain |
PNS divides into | Somatic nervous system and Autonomic nervous system |
Sensory nerves | afferent fiber |
Motor nerves | efferent fibers |
Mixed nerves | both efferent and afferent fibers |
Cranial nerves | 12 pairs |
Spinal nerves | 31 pairs |
Autonomic Nervous System Two parts | Sympathetic division and Parasympathetic division |
Sympathetic Division | fight-or-flight |
Parasympathetic Division | ordinary relaxed conditions, brings body back to normal state after emergency |