ANATOMY OF THE NERVOUS SYSTEM OVERVIEW Flashcards
what are the 3 types of fibres in white matter?
- association fibres
- commissural fibres
- projectio fibres
what are association fibres?
fibres that connect one area of the cortex with another in the same hemisphere
what are 2 examples of association fibres?
- superior longitudinal fasciculus
- inferior longitudinal fasciculus
what are commissural fibres?
fibres that connect the cortex of one hemisphere with the opposite hemisphere
what are 2 examples of commissural fibres?
corpus callosum
anterior commissure
the superior longitudinal fibres and inferior longitudinal fibres are what type of fibres?
association fibres
the corpus callosum and anterior commissure are what type of white matter fibre?
commissural fibres
what are projection fibres?
fibres that connect the cortex with subcortical regions (thalamus, basal, ganglia, brainstem, spinal cord)
what are two examples of projection fibres?
corona radiata
internal capsule
the corona radiata and internal capsule are examples of what white matter fibre?
projection fibres
what is the basal ganglia?
collection of nuclei within the cerebral hemisphere involvede in the control of movement and posture
what is the diencephalon?
The diencephalon is the central portion of the brain located around the third ventricle, superior to the brainstem and inferior to the corpus callosum and cerebral cortex.
what feature can be seen on the dorsal surface of the pons?
floor of fourth ventricle
how many spinal segments are there?
31
what are the different spinal segments?
- 8 cervical
- 12 thoracic
- 5 lumbar
- 5 sacral
- 1 coccygeal