This is a neuroscience question. what i understand about this tactile pathway PL

Question

This is a neuroscience question.

what i understand about this tactile pathway PLEASE JUST CHECK FOR ACCURACY ABOUT THE UNDERSTANDINGS. Pain and temperature afferent fibre from lower body: they go through dorsal root ganglia then the gracile nucleus then the thalamus and then finally the cerebral cortex. from the upper body: same pathway except not through gracile nucleus but from cuneate nucleus.

mechanosensory afferent fiber: it goes through dorsal root and then the synapse happens in the spinal cord and then i dont understand where it goes? goes it go straight up to the thalamus and then the cerebrum?

Tactile pathway: Posterior head & rest of the body Upper body: Dorsal root ganglia Cuneate nucleus Thalamus Cerebral cortex Cerebrum Somatic sensory cortex Ventral posterior nuclear complex of thalamus Midbrain Lower body: dorsal column nuclei Gracile nucleus Dorsal root ganglia Gracile nucleus Thalamus Cerebral cortex Medial lemniscus Cuneate nucleus oot Medulla ganglion cells Mechanosensory afferent fiber Spinal cord Receptor endingsPain and temperature afferent fiber Neuroscience, 3e, Figure 8.1 NEUROSCVENCE, Third Etion, Figure &.1 (Part 1) 2004 Sinauer Assocaies inc

Explanation / Answer

It is not the pain fibres which are carried by medial leminiscus or those in gracile and cuneate nucleus . These are the mechanosensory fibres which from dorsal root ganglia go to cuneate nucleus (lower body ) and gracile nucleus and den to thalamus and cortex.

Pain and temperature fibres which are running straight from spinal cord to thalamus and then the cortex are representing the lateral spinothalamic tract.

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