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Nervous System III

Everybody's got one?. Brain structuresCerebrum (cortex, medulla)CerebellumDiencephalonBrain StemFissures, gyri, sulci. Cerebrum. Cortical lobesmotor areassensory areasassociation areasMedullacerebral nucleitracts. Diencephalon. ThalamusHypothalamusEpithalamus. Brainstem. MidbrainPonsMedulla Oblongata.

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Nervous System III

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    1. Nervous System III May 3, 2007 BIOL 203 Karen Kraus

    2. Everybody’s got one… Brain structures Cerebrum (cortex, medulla) Cerebellum Diencephalon Brain Stem Fissures, gyri, sulci

    3. Cerebrum Cortical lobes motor areas sensory areas association areas Medulla cerebral nuclei tracts

    4. Diencephalon Thalamus Hypothalamus Epithalamus

    5. Brainstem Midbrain Pons Medulla Oblongata

    6. The Little Brain Vermis Arbor vitae Peduncles

    7. Functional Systems Limbic system hypothalamus hippocampus rhinencepalon prefrontal cortex fornix Reticular Activating System corona radiata

    8. Protection racket Meninges Dura mater Arachnoid mater Pia mater Cerebrospinal fluid Ventricles Choroid plexus

    9. Don’t you have a backbone? C1 through L1 anchored filum terminale denticulate ligaments Enlargements cervical lumbar

    10. Spinal Cord Cross Section

    11. Spinal Tracts Ascending spinothalamic spinocerebellar Descending corticospinal

    12. Good reflexes! Reflex arc types of reflexes spinal vs. cranial innate vs. acquired somatic vs. autonomic flexor (withdrawal) crossed extensor stretch

    13. The nerve! Facial Vestibulocochlear Glossopharyngeal Vagus Accessory Hypoglossal Olfactory Optic Oculomotor Trochlear Trigeminal Abducens

    14. Spinal nerves 31 pairs 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal roots form nerves, which split to form rami ventral rami from cervical, lumbar and sacral form plexuses

    15. Plexus nexus Cervical phrenic Brachial median, radial, ulnar Lumbar femoral Sacral sciatic, peroneal, tibial

    16. Versus Somatic vs. Autonomic nervous systems functional differences structural differences dual innervation two-neuron chain myelination effectors neurotransmitters

    17. Repeat Sympathetic vs. Parasympathetic

    18. Sympathetic Division

    19. Parasympathetic Division

    20. Reception Cholinergic Nicotinic Muscarinic Adrenergic Alpha Beta

    21. Action! Effects of the ANS sympathetic generally “fight or flight” parasympathetic generally “resting and digesting”

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