A needle is inserted into the right somatosensory nucleus of the thalamusin the central nervous system...

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**A needle is inserted into the right somatosensorynucleus of the thalamusin the central nervous system and thearea is injected with GABA.
1. Through what structure does a primary sensory neuronfrom the hand enter the central nervous system?
2. Where does the first synapse forthis somatosensory pathway occur?
3. Describe the type(s) of sensoryinformation carried by this pathway.
4. Name and describe two differentclasses of primary sensory receptors that are associated with thispathway.
5. Discuss the common features that all primary sensoryreceptors possess.
6. If an adrenergic substance had been injected insteadof GABA, how would this have altered neural transmission?Explain.**

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1 Primary sensory neuron from the hand enter the central nervous system through the dorsal nerve root of the spinal cord the cell bodies that carry somatic sensations are present in the dorsal nerve root ganglion 2 The first synapse for different somatic sensations occur at different levels The lateral spinothalamic tract carries pain and temperature sensations first synapse for this sensation occur at the posterior horn cells in the region of substantia gelatinosa of spinal cord The ventral anterior spinothalamic tract carries light touch pressure tickle and itch sensations first synapse for this sensation occur at See Answer

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