Medical Neuroscience Somatosensory Pathways I

Front 1

What are the 2 pathways that convey somatosensory information from the body to the cerebral cortex?

Back 1

-There is one set for all of the body except orofacial complex
-one set for just the orofacial complex

Front 2

What are the ascending spinal pathways?

Back 2

Somatosensory pathways for the body (except orofacial complex)

Front 3

What are the two ascending spinal pathways?

Back 3

-dorsal column/medial lemniscus pathway
-Anterior Lateral System (ALS)

Front 4

What type of information does the dorsal column/medial lemniscus pathway carry?

Back 4

information concerned with fine touch, proprioception, and vibration

Front 5

How is the information carried from tehh receptor to the spinal cord?

Back 5

peripheral processes of dorsal root ganglion cells provide axons to the receptors, and project to the spinal cord

Front 6

Where do the processes from the DRG cells enter the spinal cord?

Back 6

central processes enter in the posterior horn and enter the posterior funiculus

Front 7

What posistion will axons from higher levels take as they enter the posterior funiculus?

Back 7

Will be more lateral, so somatotopic organization is maintained

Front 8

What level are the axons from in the fasciculus gracilis?

Back 8

ascending branches of fibers from the sacral, lumbar, and lower 6 Thoracic dorsal roots

Front 9

What level are the axons from in the fasciculus cuneatus?

Back 9

contains ascending branches of fibers from upper 6 thoracic and cervical dorsal roots