Flashcards in 2. Structure of the CNS Deck (28)
What is the pyramidal system?
Upper motor neuron starts in the pre-central glyrus
Passes through the pyramids of the medulla
What is the extrapyramidal system?
Upper motor neuron starts in other brain centre nuclei (basal ganglia)
Don't pass through pyramids
Fine tune movement
What is the cerebellum responsible for?
Co-ordination and planning movement
What disease affects the cerebellum?
Transient cerebellar disease: drunk
Associated with intention tremor
What are the functions of the basal ganglia?
Diffuse set of nuclei responsible for allowing/stopping movements
Name the basal ganglia
What disease affects the basal ganglia?
Associated with resting tremor
What is the function of the thalamus?
Sensory relay station
Where is the thalamus located?
Either side of the third ventricle
What type of information travels in dorsal columns?
What path is taken by nerves conveying touch and proprioception?
First nerve enters and goes up to medulla
Second decussates in the medulla, goes to thalamus
Third nerve up to somatosensory cortex
What type of information travels in the spinothalamic tract?
What path is taken by nerves conveying pain and temperature?
First nerve synapses with second in spinal cord
Second goes to thalamus
Third goes to somatosensory cortex
What is contained in the limbic system?
What is the function of the limbic system?
Maintain attention to surroundings
Drives feeding and mating behaviour
What is the flow of CSF through the ventricular system?
Intraventricular foramen of Monro
3rd ventricle/cavity of diencephalon
Central aqueduct of sylvius
-Foramina of Magendie
-Foramina of Lushka
Cranial Nerve 1
Cranial Nerve 2
Cranial Nerve 3,4,6
Cranial Nerve 5
Facial and scalp sensation
Cranial Nerve 7
Cranial Nerve 8
Cranial Nerve 9,10
Cranial Nerve 11
Neck and head movement
Cranial Nerve 12
What does the cauda equina activate?
What are the signs of Cauda Equina Syndrome?
Lower back pain
Pain radiating down leg
Loss of bowel or bladder control
Weakness, tingling and numbness in saddle region