Somatosensory Organizations Flashcards
What tract contains sensory information for 2-point touch, vibration, and joint position sense?
DCML
What tract contains sensory information for pain and temperature?
Spinothalamic tract
Where does the DCML decussate?
Internal arcuate fibers in lower medulla
Where does the Spinothalamic tract decussate?
anterior commissure of the spinal cord
What a peripheral patch of skin innervated by a single nerve root level called?
Dermatome
In the DCML tract, where do fibers of the lower limb synapse?
Gracile nuclei
In the DCML tract, where do fibers of the trunk, arm and hand synapse?
Cuneate nuclei
In the DCML tract, what do the fibers projecting to the lateral horn excite?
preganglionic sympathetic fibers
In the DCML tract, what do the fibers projecting to the ventral horn excite?
Lower motor neurons
What 3 tracts is the anterolateral system consist of?
Spinothalamic
Spinoreticular
Spinomesencephalic
Which anterolateral system tract senses pain and temperature and decussates within 3 levels of spinal cord entry?
Spinothalamic
Where does the Spinothalamic tract synapse? Where does it go after synapse?
VPL thalamus to posterior limb of internal capsule
Which anterolateral system tract conveys the emotional and arousal aspects of pain?
Spinoreticular
Which anterolateral system tract projects to the midbrain peri-aqueductal gray to excite descending pain modulation?
Spinomesencephalic
What cerebellar tract conveys leg proprioception and synapses at the dorsal nucleus of Clarke and travel to the inferior cerebellar peduncle?
Dorsal Spinocerebellar tract
