Ascending Pathways Flashcards
At which location (spinal cord, midbrain, pons or medulla) do fibres in the DCML system cross the midline?
At the medulla.
What modalities are conveyed to the spinal cord by large-diameter, myelinated fibres?
Tactile and limb proprioception signals.
At which location (spinal cord, midbrain, pons or medulla) do fibres in the anterolateral system cross the midline?
At the spinal cord.
In what system (anterolateral or DCML) do the fibres divide into two separate branches, and where does each branch end up?
The DCML (fibres for touch and proprioception) One branch goes to the spinal grey matter, other branch ascends in the ipsilateral dorsal column to the medulla.§
What system (anterolateral or DCML) conveys itch?
Anterolateral
What system (anterolateral or DCML) conveys limb proprioceptive signals?
DCLM
What system (anterolateral or DCML) conveys pain signals?
Anterolateral
What system (anterolateral or DCML) conveys visceral info?
Anterolateral
Where do fibres conveying itch signals terminate within the spinal cord?
The dorsal horn
Where do fibres conveying pain signals terminate within the spinal cord?
The dorsal horn
What does the DCML system refer to?
The dorsal column medial lemniscal system.
What system (anterolateral or DCML) conveys tactile signals?
DCLM
What system (anterolateral or DCML) conveys temperature signals?
Anterolateral
Where do fibres conveying visceral info terminate within the spinal cord?
The dorsal horn
What modalities are conveyed to the spinal cord by both (a) small-diameter, thinly-myelinated and (b) unmyelinated fibres?
Pain, itch, temperature and visceral info.
