EXAM 4 NURS 5315
12 Cranial nerves - -1. Olfactory
2. Optic
3. Oculomotor
4. Trochlear
5. Trigeminal
6. Abducens
7. Facial
8. Vestibulocochlear
9. Glossopharyngeal
10. Vagus
11. Accessory
12. Hypoglossal -Afferent nerves - -sensory nerves that carry impulses from the cells, tissues, and organs to the CNS system. -Efferent nerves - -carry impulses from the CNS to cells, tissues, and organs, motor nerve -Central Nervous System - -brain and spinal cord -peripheral nervous system - -*12 cranial nerves and 31 spinal nerves *further subdivided into the somatic nervous system and the autonomic nervous system
* PNS has the afferent and efferent pathways -Neuron - -* basic functional unit of the nervous system
* fueled by glucose
* 3 parts to a neuron
- cell body
- dendrite
- axon
* mostly in the CNS and called nuclei in a group
* in the PNS the groups are called ganglia or plexus
* dendrites- projections that collect information and direct it to the cell body
* Axon- conducts impulses to the next neuron, axons are covered in myelin sheaths that are lipid material, the myelin sheaths are interrupted in certain spots by the nodes of Ranvier
* Myelin sheath- allows impulses to flow between the nodes of Ranvier in an increased velocity called the salutatory conduction.
* mature neurons do not replicate and injury to them is permanent
* grey matter
12 Cranial nerves - -1. Olfactory
2. Optic
3. Oculomotor
4. Trochlear
5. Trigeminal
6. Abducens
7. Facial
8. Vestibulocochlear
9. Glossopharyngeal
10. Vagus
11. Accessory
12. Hypoglossal -Afferent nerves - -sensory nerves that carry impulses from the cells, tissues, and organs to the CNS system. -Efferent nerves - -carry impulses from the CNS to cells, tissues, and organs, motor nerve -Central Nervous System - -brain and spinal cord -peripheral nervous system - -*12 cranial nerves and 31 spinal nerves *further subdivided into the somatic nervous system and the autonomic nervous system
* PNS has the afferent and efferent pathways -Neuron - -* basic functional unit of the nervous system
* fueled by glucose
* 3 parts to a neuron
- cell body
- dendrite
- axon
* mostly in the CNS and called nuclei in a group
* in the PNS the groups are called ganglia or plexus
* dendrites- projections that collect information and direct it to the cell body
* Axon- conducts impulses to the next neuron, axons are covered in myelin sheaths that are lipid material, the myelin sheaths are interrupted in certain spots by the nodes of Ranvier
* Myelin sheath- allows impulses to flow between the nodes of Ranvier in an increased velocity called the salutatory conduction.
* mature neurons do not replicate and injury to them is permanent
* grey matter
