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CNS Test 3
A&P
| Question | Answer |
|---|---|
| 3 meninges | Dura mater Arachnoid mater Pia mater |
| Two layers of the Dura Mater | Periosteal Layer Meningeal Layer |
| Subdural and Subarachnoid space. Which is CSF in? | Subarachnoid space |
| Choroid Plexus | ependymal cells make CSF from blood |
| Arachnoid Villus | Drains CSF back into blood |
| how much CSF in circulation | 80-150 mL of liquid cushion in circulation |
| Framen magnum | hole at the base of skull for spinal cord, boundary between brain and spinal cord |
| Functions of spinal cord | conducts nerve impulses Spinal reflex center |
| Lumbar puncture place | Between L4 and L5, between Dura and Arachnoid mater, NEVER Pia mater |
| Spinal column vs spinal cord | vertebrae and cord vs just cord |
| gray matter of spinal cord. Names of horns, and what connects the two? | Gray commissure connects the two, dorsal, ventral, and lateral horns. |
| afferent enters what side of gray matter and exits what other side? | Enters the dorsal side and exits ventral side. |
| Ascending tracts vs descending tracts of spinal cord | to brain or from it. |
| 4 major parts of the brain | Diencephalon Cerebral hemispheres Cerebellum Brain stem |
| gyri of insuli | underneath, behind the outer lobes of brain |
| Association fibers | stay in respective hemisphere |
| commissural fibers | can talk to each side through corpus collosum |
| projection fiber | cerebral cortex out of the brain to lower area |
| Basal Nuclei | collection of neuron cell bodies, relay station between cerebral cortex and spinal cord. Inhibits motor function to fine tune the control of skeletal muscle. Unconscious movement |
| Diencephalon three parts | Epithalamus, thalamus, and hypothalamus |
| Thalamus myelinated? | No |
| Thalamus | Crude awareness of sensations, directory terminal to respective parts of brain |
| Hypothalamus | visceral motor control center(autonomic), emotional control center (limbic), temperature, hunger, circadian rhythms, tells pituitary gland what to do by infundibulum (endocrine) |
| Epithalamus (above thalamus) | Pineal gland, Melatonin secretion for circadian rhythm, biological clock for menarche and menopause |
| Midbrain AKA | Mesencephalon |
| Cerebral Peduncles | motor fibers from cortex to pons |
| corpora quadrigemina | superior and inferior colliculi |
| superior colliculi | head and eyes reflex center |
| inferior colliculi | auditory reflex center |
| red nucleus | posture reflexes and muscle tone |
| muscle tone | flood of EPSP's tense to keep tone, always switches through different ones to keep them from getting tired, (red nucleus does this) |
| Pons | helps medulla control breathing (pontine respiratory group) Relays impulses between cerebellar hemispheres through cerebellar peduncles |
| Medulla Oblongata | Site of decussation (switching over sides) vital reflex centers, (heart rate, respiratory rate, blood vessel diameter) and non vital reflexes, (swallowing, vomiting, coughing and sneezing) |
| reticular formations | controls/regulates consciousness |
| Cerebellum attached to brain stem via? | 3 sets of peduncles |
| cerebellar peduncles | superior, medial, and inferior |
| Cerebellum does what? | quality control center, compares intended movement with actual and makes necessary corrective measures. |
Created by:
JoshuaB5