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25 Cards in this Set
- Front
- Back
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The DC-ML-TC tract has how many neurons overall?
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three
1. DRG 2. Gracilis/Cuneus 3. VPL |
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What tract carries accurate sensory information like fine touch, 2-point discrimination, and proprioception?
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DC-ML-TC tract
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In the DC-ML-TC tract, where does the nerve fibers cross in the spinal cord?
a. 3 segments above input level b. lower medulla c. upper medulla d. lower pons e. midbrain |
b. lower medulla
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In the DC-ML-TC tract, sensory input from the lower body enter the _______ nucleus and input from the upper body enters the ________ nucleus.
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Gracilis nucleus - lower body
Cuneal nucleus - upper body |
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What is the third neuron in the DC-ML-TC tract?
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VPL
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The 3 cerebellar tracts all send what kind of information to the cerebellum? (hint: type of proprioception)
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unconscious proprioception
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What peduncle does the DC-cuneal cerebellar tract enter?
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inferior peduncle
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The upper body's unconscious proprioception uses what tract? Where does it cross at?
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DC-Cuneal cerebellar tract
It does NOT cross. Tricky tricky. |
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Name the 2 neurons in the DC-Cuneal Cerebellar tract.
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1. DRG
2. Lateral (accessory) cuneatus nucleus |
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True/False?
The Clark nucleus of the Dorsal Spinal Cerebellar tract crosses the spinal cord. |
False - only Clark's unnamed brother crosses
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Name the 3 tracts that give unconscious proprioception to the cerebellum, and name special features about each.
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1. DC Cuneal Cerebellar tract (upper body)
2. Dorsal Spinal Cerebellar Tract (lower body - has Clark's nucleus) 3. Ventral Spinal Cerebellar tract (lower body - crosses twice) |
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True/False?
Unconscious proprioception for the lower body comes partially from the ventral spinal cerebellar tract |
True
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True/False?
The Ventral Spinal Cerebellar tract crosses twice, once in the spinal cord and once in the lower midbrain. |
True
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True/False?
The Ventral Spinal Cerebellar tract crosses twice, once in the spinal cord and once in the lower medulla. |
False - once in spinal cord, once in lower midbrain
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What sensory tract contains C-fibers and A-delta fibers?
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Anterolateral Spinal ThalamoCortical tract (ALS TC)
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Name the three places that release ENK
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1. Substansia Gelatinosa
2. Periaqueductal Gray Matter 3. Hypothalamus |
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What releases ENK throughout the body, not just locally?
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Hypothalamus - releases in the blood system
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Does the Paleo ALS TC have a major input to the post-central gyrus?
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No - very little somatosensory input
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Does the Neo ALS TC have a major input to the post-central gyrus?
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Yes - major somatosensory input
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What nucleus in the thalamus does the Paleo ALS-TC use to get to the cortex?
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MD (medial dorsal)
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The paleo ALS-TC tract activates the MD thalamic nucleus. What 2 places does this go, and what does each do?
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1. Prefrontal cortex - cognition/behavior
2. Cingulate gyrus - emotional response |
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What cortex of the thalamus sends a wide and varied signal, activating all the areas of the cortex?
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ILTN - Intralaminar thalamic nucleus
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When you can't sleep due to chronic pain, what thalamic nucleus is being activated?
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ILTN - intralaminar thalamic nucleus
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What area of the ALS-TC tract gives off serotonin, and what is serotonin's target location?
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Raphe Nucleus gives off serotonin which makes the Substantia Gelatinosa (target) give off more ENK to block pain.
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What level of the brain stem/spinal cord is the Locus Coerulus located at?
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Upper pons
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