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