IMED3002 Lecture Notes - Lecture 8: Postcentral Gyrus, Medial Lemniscus, Spinocerebellar Tract
28 May 2020
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Flow of sensory info from receptors to spinal cords: Unconscious pathways: 2 neuron chain pathway as we are not projecting to the cortex. Then can group them as sensory or motor axon. Cell body in the dorsal root ganglion: at this level: synapse in the posterior thoracic nucleus. Sitting in the lateral horn but medial to that. Synapsing in the nucleus and projecting to the cerebellum on the same side. Posterior spinocerebellar tract does not cross over and is concerned with the proprioception on the same side of the body. Different: anterior spinocerebellar tract: only that crosses over once when it comes in, ascends on opposite side: contralateral side. Information from one side of the body goes to the cerebellum. 1st neuron enters the posterior horn and may travel 1-2 segments ipsilateral in the lissauer tract then synapse in the substantia gelatinosa and nucleus proprius (rexed laminae 2-
