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31 Cards in this Set
- Front
- Back
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Cranial Never Olfactory l |
purely sensory; carries impluses for the sense of smell |
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Cranial Nerve Optic ll |
Carriers impulses for vision |
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Cranial Nerve Oculomotor lll |
Supplies motor fibers to four of the six muscles (superior, inferior, medial rectus, and inferior oblique) |
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Cranial Nerve Trochlear lV |
Supplies motor fibers for one extrenal eye muscle |
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Cranial Nerve Trigeminal V |
Conducts sensory impulses form the skin of the face and mucosa of the nose and mouth; also contains motor fibers that activate the chewing muscles |
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Cranial Nerve Abducens Vl |
Supplies motor fiber to the lateral retus muscle, which rolls the eye laterally |
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Cranial Nerve Facial Vll |
Activates the muscles of the facial expression and the lacrimal and salivary impulses form the taste buds of anterior tongue |
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Cranial Nerve Vestibulocochlear Vll |
Vestibular branch transmits impluses for the sense of balance, and cochlear branch transmits impulses for the sense of hearing |
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Cranial Nerve Glossopharyngeal Xl |
Supplies motor fibers to the pharynx that promote swallowing snd saliva production; carries sensory impulses form taste buds of the posterior tongue |
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Cranial Nerve Vagus X |
Fibers carry sensory impulses from the motor impulses to the pharynx, larynx, and the abdominal and thoracic viscera |
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Cranial Nerve Accessory Xl |
Mostyl motor fibers that activate the sternocleidomastiod and trapezius muscles |
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Cranial Nerve Hypoglossal Xll |
Motor fibers control tongue movements; sensory fibers carry impluses from the tongue |
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Central Nervous System (CNS) |
Brain, spinal cord |
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Central Nervous System (CNS) |
Brain, spinal cord |
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Cerebrospinal Fluid (CSF) |
Similar to blood plasms composition Formed by the Choriod Plexus Forms a watery cushion to protect the brain Circulated in arachnoid space ventrides and central canal of the spinal cord |
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Blood brain barrier |
Includes the least permeable capillaries of the body Excludes many potentate harmful substance Useless as a barrier against some substances Fats and fat soluble molecules Respiratory gases Alcohol Nicotine Anesthesia |
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Regions of the brain: Brain Stem |
Attaches to the spinal cord Parts of the brain stem -midbrain, pons, medulla oblongata |
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Midbrain |
Mostly composed of tracts of nerve fibers Has 2 bulging fiber tracts- cerebral perduncles Has 4 rounded proteusions- corpora quadrigemes |
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Pons |
The bulging center part of the brain stem Mostly composed of fibers tracts Includes nuclei involved in the control of breathing |
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Medulla Oblongata |
The lowest part of the brain stem Merges into the spinal cord Includes important fiber tracts Contains important control centers Heart rate control, blood pressure regulation, breathing, swallowing, vomiting |
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Sensory (Afferent) division |
Never fibers that carry info TO the CNS |
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Motor (Efferent) division |
Nerves fibers tgat carry impluses AWAY from the CNS |
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Perepheral Nervous System (PNS) |
Nerves outside the brain and spinal cord Spinal and Cranial nerves |
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Astrocytes |
Abundant, start shaped cells Brace neurons Form barrier between capillaries and neurons Control the chemical environment of the brain |
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Microgilia |
Spiderlike phagocytes Dispose of debris |
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Ependymal Cells |
Lines cavities of the brain and spinal cord Circulate cerebraspinal fluid |
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Oilgodendrocytes |
Wrap around nerve fibers in the central Nervous System Produce myelin sheaths |
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Satellite cells |
Protect neuron cell bodies |
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Schwann Cells |
Form myelin sheaths in the peripheral nervous system |
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Protection of the Central Nervous System |
Scalp and skin Skull and verabral column Menings Cerebrospinal Fluid (CSF) Blood Brain Barrier |
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Meninges |
Dura Mater Double layer external covering Periostem-attatched to inner surface of the surface of the skull Meningeal layer-outer covering of the brain Arachnoid Layer Middle layer Web like Pia Mater Internal layer Clings to the surface of the brain |
