Lecture 3 Flashcards
What is discriminative information
The ability to identify two points of touch as two distinct points
What is non discriminative information?
Temperature and Pain
What are the three regions in the gray matter of the spinal cord
sensory, autonomic, motor
What regions make up the dorsal funiculus/columns and what type of information do they carry
cuneate fasiculus and gracile fasciculus, discriminative
What is the lateral funiculus also known as
motor columns
What is the function of the ventral funiculus
Has pain and temperature neurons
What is the nucleus proprius
an area where fibres project into for proprioception
what is proprioception
awareness of the body in space and what it feels
Where do free nerve endings enter
the substantia gelatinosa then into the ventral funiculus
Describe the neurons in the substantia gelatinosa
they are known as opoid receptors too because they are involved in sensing pain and temperature
What are the dorsal column nuclei
the cuneate and gracile nucleus
What path does does information from sensory nerve endings go through to get to the primary sensory cortex
Dorsal root –> Cuneate/Gracile nucleus –> internal arcuate fibres –> medial lamniscus –> medulla, pons midbrain –> thalamus –> third order neuron –> internal capsule -> primary sensory cortex
What does the thalamus do?
provides cortex with information that is critically important, blocks out irrelevant information
What path does information from free nerve endings take to reach the primary motor cortex
Dorsal root –> termination in substantia gelatinosa –> anterior white commissure –> spinothalamic fibres in spinal cord, medulla, pons, midbrain, thalamus –> primary motor cortex
