31. Recently, skin biopsy has been used to investigate mechanoreceptors and their myelinated afferents . 32. These signals ( action potentials ) are transmitted along afferent neurons into the brain. 33. The VLPO also receives afferent projections from the DMS nuclei of the arousal system. 34. Often tumor cells secrete growth factors which activate receptors close to primary afferent neurons. 35. Layer I is subdivided into layers Ia and Ib each having its own afferents . 36. Similarly, afferent fibres from the spinothalamic tract synapse at the periaqueductal grey matter. 37. Visceral afferent fibers go to spinal cord following pathway of pelvic splanchnic nerve fibers. 38. Firstly, locomotor movements can be initiated or blocked by some proprioceptive afferent inputs. 39. See Wikipedia articles Nerve and Afferent nerve fiber. 40. These afferents also go to the valvula cerebelli.
