Ascending Sensory Pathways Flashcards
What information runs in the somaesthetic pathways?
perception of bodily senses - pain, temperature, touch and position
Which types of sensation run in the spinothalamic pathway?
pain, temperature and some touch
Which types of sensation run in the dorsal column pathway?
touch (discriminatory, fine, precise), vibration and position
What is proprioception?
knowing where you are in space
How are somaesthetic modalities split into 2 groups?
those which are essential for survival and those which increase detail
What type of fibres carry modalities which are essential for survival?
thin, poorly mylinated or unmyelinated fibres (conduction is slow_
What type of fibres carry modalities that increase detail?
large diameter, heavily myelinated, fast conduction
Which pathway do modalities which are essential to survival run?
spinothalamic pathway
How many neurones are there in a general sensory pathway?
3
On which side of the spinal column do primary neurones of the dorsal column pathway synapse?
same side it enters
at what level do neurones of the spinothalamic pathway cross the spinal cord?
at the level they enter the cord
What does the spinothalamic tract change its name to at the level of the brainstem?
SPINAL LEMNISCUS
Which is more medial: gracile of cuneate tubercle?
gracile
Form what level does information get carried In the cuneate fascicle?
T6
where do primary neurones of the dorsal column pathway synapse?
gracile and cuneate nuclei
