3.2 neuro - sensory systems Flashcards
Which senses travel along the dorsal column / medial lemniscus system
Fine touch and proprioception
What senses travel along the anterolateral system
gross touch, pain, temperature, visceral sensation
Where is the primary / first neuron in the dorsal column / medial lemniscus system
in the dorsal root ganglion (skin)
Where is the second neuron in the dorsal column / medial lemniscus system
Within the brain stem (medulla oblongata), nucleus cunetus or gracilis
Where is the third neuron in the dorsal column / medial lemniscus system
Within the ventral posterior nucleus of the thalamus
What is the destination of the dorsal column / medial lemniscus system
Primary sensory cerebral cortex (homunculus)
What is a peripheral process for a sensory system
receptor located in the skin or viscera
Where does the first neuron in the dorsal column / medial lemniscus system travel
In the fasciculus gracilis or cutaneus
Where does the first neuron in the dorsal column / medial lemniscus system synapse
Brain stem, nucleus crutaneus / gracilus
Where does the dorsal column / medial lemniscus system cross the midline
Brain stem
In what fibers does the second neuron in the dorsal column / medial lemniscus system cross the midline
Internal arcuate fibers
In what fibers does the second neuron in the dorsal column / medial lemniscus system ascend
Medial lemniscus
Where do the axons of the third neuron in the dorsal column / medial lemniscus system travel
to the primary sensory cortex through the internal capsule
Where is the primary / first neuron located in the anterolateral system
dorsal root ganglia
Where do the axons of the first neuron in the anterolateral system travel
to the dorsal horn of the spinal cord
