Second lecture exam CNS - general
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| Cranially, the central canal is continuous with the ___ and ___. Inferiorly, it expands to the ___. | 1. MO 2. 4th ventricle 3. Terminal ventricle
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| Lateral cornu function? Where is the lateral horn present? | 1. Autonomic motor cornu 2. T1-L2 (T1-T12 has a lateral horn)
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| How much does the spinal cord weigh? | 27-35 grams 2% of total CNS wieght
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| The spinal cord is how long? | 40-45 cms
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| Max diameter of the spinal cord? WHere? Ocuupies __ % of vertebral canal? | 1. 1.3 cm 2 C5-C6 3. 75%
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| Pontine nuclei accept input from the ___ and relay it to the cerebellum via ___. | 1. Cerebral cortex 2. Middle cerebellar nuclei
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| NCAMs | Nerve Cell Adhesion Molecules
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| Which lamina has the important pain reception area calle substantia gelatinosa? | Rexed lamina 2
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| Dorsal Cornu function | Sensory... afferent
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| Function of ventral cornu | Motor... efferent
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| Which lamina house the nuclei proprius? | 3 + 4
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| Superior and inferior boudries of the spinal cord? | Superior: superior most ventral rootlet of C1 spinal nerveInferior: Disc between L1 and L2
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| Dorsal roots contain ___ fibers? | Sensory : afferent
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| Ventral rootlets contain ___ fibers? | Motor : efferent
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| Where does C1 exit from? | Occiput and C1
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| Where does C4 exit from? | C3 and C4
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| Where does C8 exit from? | C7 and T1
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| Where do S1-S4 nerves exit from? | Dorsal and ventral sacral foramina
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| Where does S5 exit from? | Sacral hiatus
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| Where does CO1 exit from? | Sacral hiatus
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| What exits from the sacral hiatus? | The nerves from S5 and CO1
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| The spinal cord ends between which 2 vertebrae? What is the tapering end of the cord called? | 1. Between L1 and L2 2. Cornus medualris
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| Tiny channel down the center of the spinal cord? | Central canal
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| Longitudinal bundle of white mater that can be anatomically observed | Funiculli
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| Dense concentration of neuron cell bodies | Grey mater
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| Anatomist who discovered 10 lamina on gray mater? | Rexed
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| Lamina 1 | Thin cap over dorsal horn
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| Lamina 5 | Formatio reticularis.. only in cervicals!!
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| Lamina responsible for skeletal muscle movement? | 9
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| Where do alpha motor neurons synapse? | Rexed lamina 9
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| Lamina that surrounds centeral canal? | 10
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| Dense concentraion of neuron fiber axons? | White mater
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| Bundles of functionaly related axons with a funiculus? | Tract, fasiculi
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| Many descending tracts synapse in this lamina, an intermediate area? | 7
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| Lamina on medial aspect of ventral horn? | 8
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| Law that states that ventral roots contain motor fibers and dorsal roots contain sensory fibers? | Bell-Magendie Law
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| Lamina 2 | Pain reception : substantia gelintanosa
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| Lamina 3 and 4 | Nuclei proprius
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| 2 nuclei that are found in lamina 7 | Nucleus dorsalis = Clark's column and intermediolateral nuclei in lateral horn
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