P/S III pathways

Question 1

What type of sensation does the anterolateral spinothalamic pathway conduct?

Answer 1

Nondiscriminative (pain/temp) broad spectrum, poor inensity, difuse location, and referred.

Question 2

What type of sensation does the dorsal column medial lemniscal pathway conduct?

Answer 2

Discriminative, (ie stereognisis and 2pt) Precise, intense, and specific location.

Question 3

Afferent fibers of anterolateral spiniothalamic pathway are (size and speed)?

Answer 3

Small-diameter, slowly conducting.

Question 4

Afferent fibers of dorsal column medial lemniscal pathway are (size and speed)?

Answer 4

Large, rapidly conducting.

Question 5

Origin and types of anterolateral spinothalamic pathway?

Answer 5

Skin (mechano, thermo, and noci receptors).

Question 6

Origin of dorsal column medial lemniscal pathway?

Answer 6

Skin, jts, and tendons. (specialized receptors)

Question 7

Projection of anterolaterspinothalmic pathway?

Answer 7

dorsal roots->dorsal horns (synapse)->cross and ascend sc->medulla->pons->midb->ventroposterolateral nucleus of the thalamus.

Question 8

Projection of the dorsal column medial lemniscal pathway?

Answer 8

dorsal roots->ascend to medulla->synapse dorsal column nuclea->cross->ascend to thalamus->project to the sensory cotex