Nerve05/disorders of the spinal cord and optic pathway/ascending pathway of deep and touch sensation
深部覚・触圧覚の伝導路では，後根から脊髄に入ると，シナプスを形成せずに，第１次感覚神経線維が後索を延髄まで上行します．この上行路を後索路とよびます．延髄で第２次感覚神経細胞体にシナプスを形成し，第２次感覚神経線維が延髄で左右の正中線を交叉します．
Challenge Quiz
Deep sensation from joints and muscles travel through the spinothalamic tract.posterior column-medial lemniscus pathway. corticospinal tract (pyramidal tract) .
Touch/pressure sensation of the skin travel through the spinothalamic tract.posterior column-medial lemniscus pathway. corticospinal tract (pyramidal tract) .
Deep sensation from joints and muscles travel through the anterior. lateral.posterior funiculus (colulmn).
Skin touch/pressure sensation travel through the anterior. lateral.posterior funiculus (colulmn).
In the pathway for deep sensation from joints and muscles, the 1st. 2nd. 3rd sensory neuron ascend the spinal cord.
In the pathway for skin touch/pressure sensation, the 1st. 2nd. 3rd sensory neuron ascend the spinal cord.
For deep sensation from joints and muscles, the pathway enters the spinal cord from the anterior.posterior root, does.does not synapse immediately afterwards, and ascends the spinothalamic tract.posterior column-medial lemniscus pathway. corticospinal tract (pyramidal tract) of the same. opposite side of the spinal cord, synapse in the medulla oblongata. hypothalamus , ascend the same side.cross to the other side , synapse in the thalamus. hypothalamus , travel through basal ganglia.internal capsule. limbic system , and reach the primary somatosensory cortex. primary motor cortex in the precentral gyrus.postcentral gyrus in the frontal. temporal.parietal. occipital lobe.
For touch/pressure sensation of the skin, the pathway enters the spinal cord from the anterior.posterior root, does.does not synapse immediately afterwards, and ascends the spinothalamic tract.posterior column-medial lemniscus pathway. corticospinal tract (pyramidal tract) of the same. opposite side of the spinal cord, synapse in the medulla oblongata. hypothalamus , ascend the same side.cross to the other side , synapse in the thalamus. hypothalamus , travel through basal ganglia.internal capsule. limbic system , and reach the primary somatosensory cortex. primary motor cortex in the precentral gyrus.postcentral gyrus in the frontal. temporal.parietal. occipital lobe.