Note that at least some of the output from the hypothalamus lies outside of the DLF, within a set of Descending Hypothalamic Fibers running next to the spinothalamic tract; lesions of this area canonically lead to ipsilateral Horner's syndrome.
32.
The "'posterior trigeminothalamic tract "'( or "'dorsal trigeminothalamic tract "') serves as a pain and temperature pathway from the face, head and neck ( the facial equivalent of the spinothalamic tract ).
33.
The axons of the tract cells cross over ( decussate ) to the other side of the spinal cord via the anterior white commissure, and to the anterolateral corner of the spinal cord ( hence the spinothalamic tract being part of the anterolateral system ).
34.
In humans, temperature sensation enters the spinal cord along the axons of Lissauer's tract that synapse on second order neurons in grey matter of the decussate, joining the spinothalamic tract as they ascend to neurons in the ventral posterolateral nucleus of the thalamus.
35.
It could also reduce nociception, thermoception, and crude touch, but, since information from the spinothalamic tract is interpreted mainly by other areas of the brain ( see insular cortex and cingulate gyrus ), it is not as relevant as the other symptoms.
36.
In humans, temperature sensation from thermoreceptors enters the spinal cord along the axons of Lissauer's tract that synapse on second order neurons in grey matter of the decussate, joining the spinothalamic tract as they ascend to neurons in the ventral posterolateral nucleus of the thalamus.
37.
In the medulla, the ascending spinothalamic tract ( which carries pain-temperature information from the opposite side of the body ) is adjacent to the ascending spinal tract of the trigeminal nerve ( which carries pain-temperature information from the same side of the face ).
38.
A neuroanatomical review of the pain pathway, " Afferent pain pathways " by Almeida, describes various specific nociceptive pathways of the spinal cord : spinothalamic tract, spinoreticular tract, spinomesencephalic tract, spinoparabrachial tract, spinohypothalamic tract, spinocervical tract, postsynaptic pathway of the spinal column.
39.
This means that a lesion of the dorsal columns will cause loss of touch and proprioception below the lesion and on the same side as it, while a lesion of the spinothalamic tracts will cause loss of pain and temperature below the lesion and on the opposite side to it.
40.
The location of cord lesions affects presentation-for instance, a central lesion ( such as that of syringomyelia ) will knock out second order neurons of the spinothalamic tract as they cross the centre of the cord, and will cause loss of pain and temperature without loss of fine touch or proprioception.
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