Nervous System Dr. Brasington

Neuron

Neuroglia  Neuroglial cells fill spaces, support neurons, provide structural frameworks, produce myelin, and carry on phagocytosis. 4

Types of neuroglial cells  Microglial cells are small cells that phagocytize bacterial cells and cellular debris.  Oligodendrocytes form myelin in the brain and spinal cord.  Schwann cells are the myelin-producing neuroglia of the peripheral nervous system.  Astrocytes are near blood vessels and support structures, aid in metabolism, and respond to brain injury by filling in spaces.  Ependymal cells cover the inside of ventricles and form choroid plexuses within the ventricles.  Satellite Cells Surrounds neurons in PNS ganglia  nourishes neurons and regulates chemical environment

Fig09.03 Fluid-filled cavity of the brain or spinal cord Ependymal cell Microglial cell Myelin sheath (cut) Axon Node Oligodendrocyte Capillary Neuron Astrocyte 6

Astrocytes

Microglial cell

Meninges 10 Fig09.21

Transverse Fissure

Cranial Nerves Cranial Nerves Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal On occasion, our trusty truck acts funny—very good vehicle anyhow On occasion, our trusty truck acts funny—very good vehicle anyhow

Cranial Nerves Cranial Nerves Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal Oh Oh Oh To Touch And Feel Virgin Girl’s Vagina, AH Oh Oh Oh To Touch And Feel Virgin Girl’s Vagina, AH Oh Oh Oh To Touch And Feel Virgin Guy’s Valls, AH Oh Oh Oh To Touch And Feel Virgin Guy’s Valls, AH

Figure 13.6b Location and function of cranial nerves. Cranial nerves I – VI Sensory function Motor function PS* fibers Cranial nerves VII – XII Sensory function Motor function PS* fibers Olfactory Optic Oculomotor Trochlear Trigeminal Abducens I II III IV V VI Yes (smell) Yes (vision) No Yes (general sensation) No Yes No Yes No VII VIII IX X XI XII Facial Vestibulocochlear Glossopharyngeal Vagus Accessory Hypoglossal Yes (taste) Yes (hearing and balance) Yes (taste) No Yes Some Yes No Yes No *PS = parasympathetic Memory Tool Some Say Marry Money, But My Brother Says Big Boobs Matter More

LR 6 SO 4 AO 3 - chemical equation for eye muscle innervation

Choroid

Ossicles

Otoliths

Plantar Reflex L5, S1,2 Corticospinal Toes point down

Weber Test

Reflex Arc (Motor Neuron) (Sensory Neuron)

Plantar reflex (Babinski sign)

Snellen Eye Chart Higher Denominator, Worse vision

Ishihara Color Blindness Plates

Astigmatism Test