case 19 Flashcards
what would cause the achilles reflex to be weak or absent?
a lower motor neuron lesion.
what are 2 impacts of upper motor neuron lesions on reflexes?
abnormal plantar reflex (babinski’s sign)
exaggerated patella reflex
where do nerve fibres of the spinothalamic pathway decussate?
ventral white commissure (bundle of nerve fibres which cross the spinal cord)
what is paraesthesia?
abnormal sensation of the skin-eg burning, prickling, tingling, numbness
what are the immune cells of the CNS?
microglia
what is dysarthria?
failure to articulate speech
what are the 2 geniculate nuclei responsible for?
carrying auditory and visual sensory information.
what is the sciatic nerve an example of?
lower motor neurone
which sensory receptor is responsible for detecting vibration?
pacinian corpuscle (detects pressure and vibration)
how do alpha-delta type fibres mediate pain?
through stimulation of a high threshold mechanoreceptor.
how do you best describe the connective tissue of the liver?
loose-reticular connective tissue
what is the spinal component of the reciprocal inhibitory pathway?
1a inhibitory interneurone
