Q. With regard to pain pathways, all the following are true EXCEPT: (Solved)
1. peripheral afferents are transmitted along A (delta) and C fibres
2. an intact cerebral cortex is necessary for pain sensation
3. the synaptic transmitter released by primary afferent fibres subserving pain is substance P
4. afferent fibres subserving pain sensation from viscera reach the CNS by both sympathetic and parasympathetic pathways
5. the sensory organs for pain are marked nerve endings
- b. an intact cerebral cortex is necessary for pain sensation