Flashcards in Spinal cord, ascending and descending pathways Deck (22):
How many pairs of spinal nerves are there?
What are the 2 enlargements of the spine?
Posterior roots are motor/sensory, whilst anterior roots are motor/sensory.
Posterior roots = sensory
Anterior roots = motor
The _____ ligament suspends the spinal cord
The inner H of the spinal cord is the ____ matter
H = grey matter
What is contained within the central canal of the spinal cord?
What arteries suppl the spinal cord?
3 longitudinal arteries
Where is the epidural space found? What does it contain?
Epidural space is between dura matter and bone. Contains:
-epidural venos plexus
What is the main neural tract conveying touch, vibration and prorioception up to the somatosensory cortex?
The Dorsal Column Medial Lemniscus System
The Dorsal colum medial lemniscus fibres cross in the _____
The Dorsal column medial lemniscus system second order fibres synapse in the _____
What modalities are carried up to the somatosensory cortex by the Spinothalamic Tracts (anterior and lateral)?
Anterior Spinothalamic tract:
Lateral Spinothalamic tract:
The Spinothalamic tract fibres cross at the _____
spinal cord level
Where in the brain do the spinothalamic tract second-order fibres synapse?
Thalamus, with third-order neurons that travel to somatosensory cortex
Where in the cerebrum is the primary somatosensory cortex located?
What's the location of the primary motor cortex in the brain?
precentral gyrus (of the cerebral cortex)
Name the descending (motor) spinal tract.
-Corticospinal (Pyramidal) tract
What is the modality of the corticospinal tract?
fine, precise movement
Where do most of the fibres of the corticospinal tract decussate?
How does a Cardiovascular Accident (CVA) at the internal capsule affect the Corticospinal tract, i.e. what is the clinical picture?
spastic paralysis (decorticate posturing)
What reflex is mediated by the Tectospinal tract?
Head/neck movements due to visual stimul
-e.g. turning towards moving object