Term
| what does a golgi stain show? |
|
Definition
| completely labels individual neurons, but only a few out of the total population of neurons |
|
|
Term
| what is visualized with a nuclei acid stain? |
|
Definition
| labels all neurons, but only the components in cell bodies |
|
|
Term
| what are the characteristics of stains that bind myelin? |
|
Definition
| -label white matter (i.e. axons); white matter shows up black |
|
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Term
what info is carried into cells of the posteromarginal nucleus?
what other spinal cord nucleus carries the same modalities? |
|
Definition
pain and temperature
-substantia gelatinosa |
|
|
Term
| what modality is carried in cells of nucleus proprius |
|
Definition
| fine touch and proprioception |
|
|
Term
| where is the nucleus Dorsalis located and what does it carry? |
|
Definition
-located in dorsal horn at thoracic and upper lumbar levels
-carries proprioception |
|
|
Term
| what modality is carried in the cells of the secondary visceral gray nucleus? |
|
Definition
|
|
Term
| what modality is carried by cells of the intermediolateral cell column? |
|
Definition
| visceral motor - i.e. preganglionic sympathetic neurons (T1-L2); parasymp (S2-4) |
|
|
Term
| what kind of cells are in the ventral horn of the spinal cord gray matter? |
|
Definition
|
|
Term
| which cell columns of the spinal cord gray matter are continuous? |
|
Definition
| substantia gelatinosa; medial column of ventral horn cells (axial muscles) |
|
|
Term
| what cells are found in the lateral columns of the ventral horn? |
|
Definition
| cells innervating limbs; this accounts for the cervical (upper limb) and lumbar (lower limb) enlargements |
|
|
Term
| what is the distribution of white matter throughout the spinal cord? |
|
Definition
| decrease from cervical to sacral segments |
|
|
Term
| describe the steps involved in the flexor reflex |
|
Definition
1. stimulus transmitted via receptor and carried via axons of DRG sensory cell
2. synapses on flexor motor neuron cells
3. synapses on inhibitory interneurons that inhibit extensors (antagonists) |
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