Term
| What do the alar lamina and basal lamina eventually become? |
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Definition
The alar lamina becomes the posterior horn
The basal lamina becomes the anteriro horn.
Alar = posterior = sensory
Basal = anterior = motor
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Term
| What is white matter composed of? |
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Definition
1. Neuronal axons (but not neuronal cell bodies)
2. Funiculi (3 large regions of white matter)
3. Funiculi are composed of individual tracts or fasciculi (functioinal pathways) |
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Term
| What sulcus contains the posterior median septum, and what is the posterior median septum composed of? |
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Definition
| The posterior median sulcus contains the posterior median septum, which is made up of delicate pia mater. |
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Term
What separates the Fasciculus Cuneatus and Fasciculus Gracilis?
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Definition
| The posterior intermediate sulcus. |
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Term
| What is significant about the intermediate gray region of the gray matter? |
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Definition
| This is where the dorsal and ventral horns meet. |
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Term
| What are some identifying features of the cervical spinal cord? |
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Definition
1. Oval shape
2. Cuneatus funiculus and gracile funiculus
3. Proportionately larger than other regions |
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Term
| What is the function of Clarke's nucleus and where is it found? |
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Definition
| It is found in lamina 7 of the Thoracic spinal cord. It's function is to project neurons to the cerebellum. |
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Term
| What lamina is substantia gelatinosa found in, and what is it's function? |
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Definition
Lamina 2
It receives pain and temperature information and sends it to the anterolateral system. |
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Term
| What is the importance of the lateral horn in the thoracic spinal cord? |
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Definition
| It contains the intermediolateral cell column which contains preganglionic sympathetic neurons. |
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Term
| How does the intermediolateral cell column of the sacral region differ from the one in the thoracic region? |
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Definition
| The intermediolateral cell column in the sacral region contains preganglionic parasympathetic fibers - not sympathetic ones like in the thoracic region |
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Term
| What pathways/tracts are located in the dorsal funiculus? |
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Definition
| Gracile fasciculus and cuneate fasciclus. |
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Term
| What pathways/tracts are located in the lateral funiculus? |
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Definition
1. Anterolateral system
2. anterior and posterior spinocerebellar tracts
3. Lateral corticospinal tract |
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Term
| What does the anterolateral system do |
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Definition
| It is an ascending tract carrying pain, temperature, and crude touch information |
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Term
| What is the importance of the anterior and posterior spinocerebellar tracts? |
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Definition
ascending proprioception to cerebellum
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Term
| What is the importance of the lateral corticospinal tract? |
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Definition
| Descending motor tract carrying fine motor control from cortex to distal limb mm |
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