Flashcards in Lecture: Ascending Sensory Pathways II Deck (13):
in which cranial nerves is general sensation from the head carried?
where do sensory fibres from the cranial nerves carrying sensation from the head run?
Trigeminal Sensory Nucleus
part of the Trigeminal Sensory Pathway
What are the major divisions of the Trigeminal Sensory Nucleus
From rostral to caudal:
Pontine/Chief sensory nucleus
To which part of the TSN does pain and temperature information travel?
The most caudal part of the spinal nucleus
the caudal end
To which part of the TSN does touch and pressure information travel?
To the most rostral part of the spinal nucleus
the caudal end
Where are the primary neuron cell bodies for pain, temperature, touch, pressure and discriminatory touch pathways?
In the trigeminal ganglion
situated prior to entry to the brainstem and the TSN
What type of fibres carry information regarding pain, temperature, touch and pressure?
Thin, slow fibres
What would be the consequences of a lesion on the right of the medulla
loss of sensation from RIGHT side of face
loss of sensation from the LEFT side of body
What is different about Propriocetion fibres travelling to the mesencephalic nucleus?
First order neuron cell body not located in the peripheral ganglia, but actually within the TSN itself, in mesencephalic nucleus
Where do fibres carrying information about discriminatory touch travel?
Travel to Pontine (chief sensory) nucleus
large one in the middle of TSN
What type of fibres carry information about discriminatory touch?
fast conduction fibres
How do secondary fibres ascend to the thalamus?
In the Trigeminothalamic tract
to the ventroposteromedial thalamus (VPM)