Pain signals from the head travel to brainstem via cranial nerves V, VII, IX, and X.
- From the neck down pain travels via the:
- -spinothalamic tract *must know*
- -spinoreticular tract
- -gracile fasciculus
Spinothalamic tract is the major pain pathway: carries most of the somatic pain signals to the cortex where we become aware of pain
Spinoreticular tract:carries pain signals to reticular formation of brain stem and the hypothalamus and limbic system, triggers visceral, emotional, and behavioral reactions (nausea, fear, reflex responses)