Definition: 'Gracile Nucleus'
gracile nucleusType: Term
1. the medial of the three nuclei of the dorsal column, the remaining two being the cuneate nucleus and the accessory cuneate nucleus, which corresponds to the clava; it can be divided into a pars centralis [TA] (central part [TA]), cell nest region [TAalt]), a pars rostralis [TA] (rostral part [TA], shell region [TAalt]), and subnucleus rostrodorsalis [TA] (rostrodorsal subnucleus [TA], cell group z [TAalt]; it receives dorsal root fibers conveying sensory innervation of the leg and lower trunk, and projects, by way of the medial lemniscus, to the ventral posterolateral posterior nucleus of the thalamus.
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