Lecture11: Ascending Pathways And Somatosensory Cortex Flashcards
Which pathway is responsible for the ability to read braille (Graphesthesia)?
DCML
Which pathway is responsible for conscious proprioception?
DCML
What do the secondary neurones ascend as?
Medial lemniscus
What is the ventrolateral system respond for?
Pain and Temperature
In which part of the spinal cord is the ventrolateral system present?
in the ventrolateral part
In which parts of the brain does the ventrolateral system relay information?
The hypothalamus and thalamus
Which side of the STT Pathway is responsible for Itch, tickle and pressure?
The anterior side (PALEO)
Which side of the STT Pathway is responsible for Fast pain?
The Lateral side (NEO)
Which pathway mediates slow pain?
Spinoreticular tract
What are the spinoreticular tract’s main functions?
To arouse the cortex and stimulate Limbic cortex to the nature of the stimulus
Which pathway is associated with visceral pain?
STT pathways Spinoreticular tract
What is the function of the Spinotectal tract?
Mediates visuospinal reflexes via the turning of the head or eyes
What is the origin of the Spinotectal tract?
The Cervical Spinal Cord
Where does the Spinotectal tract end?
The Superior Colliculus
Is the Spinotectal Pathway a crossed pathway?
Yes
Where does the Spino-Olivary tract ascend to?
the ION in the medulla
Is the ION associated with motor learning?
Yes
What is the function of the Spino-olivary tract?
Modifys movements in case of encountering an unexpected obstacle
What is the function of the SCBT Pathway?
Monitor and modify movements
What sensations are conveyed from the SCBT Pathway?
Muscle stretch and joint position and tension tension
What type of nerve fibers are conveyed in the SCBT Pathway?
A-alpha fibres
Does the SCBT Pathway require continuous feedback on what the muscles are doing?
Yes
Where does the SCBT Pathway end?
The Cerebellum
Which Pathway is responsible for conscious proprioception?
DCML
What does the Conscious proprioception pathway do?
Weight of an object
What pathway is responsible for Unconsious proprioception?
SCBT
What does the Unconscious pathway do?
The sensation of limb and joint movement, also walking talking and what not
In which side of the SÍ cortex does analysis of somatosensory information occur?
Posterior
The Primary somatic sensory area 2 is responsible for which tactile features?
Learning and memory
Brodmann’s areas 5 and 7 are important for stereogenesis?? (Higher level of interpretation of sensory experiences)
Yes
Should brodmanns areas 5 and 7 get damaged, what would happen?
The person would not be able to recognize objects via touch
