Lecture 6 Flashcards
What is the upper motor neuron vs lower motor neuron?
relays info to midbrain to synapse at spinal cord vs. Retrieves info from upper motor neuron to muscle spindle
What is the reflex pathway?
stimulus -> sensory neuron-> CNS -> effector
How many neurons are involved in a reflex pathway?
two or more
What are the two types of effectors?
somatic and visceral/ autonomic
What are the different locations for the sensory and motor neurons?
ipsilateral (same side) or contralateral (opposite side)
What is the different number of synapses in the spinal cord?
monosynaptic or polysynaptic. Monosynamptic is a quick initial pain and poly is a long dull pain
What is an example of a stimulus receptor effector and type of arc for stretch reflexes?
tapping patella ligament -> muscle spindle -> quad contracts - ipsilat monosynap arc
What is an example of a stimulus receptor effector and type of arc for flexor reflex?
stepping on nail -> touch pain pressure -> hamstring contracts - ipsilat polysynap arc
What is an example of a stimulus receptor effector and type of arc for crossed extensor reflex?
step on nail -> touch pressure pain -> opposite quad leg contracts - contralateral and polysynap arc
What is the reciprocal inhibition?
allowing the agonist to contract while the antagonist does not
What is an autonomic spinal reflex example?
stretching of bladder to contract when peeing
What is the role of cerebrum?
make sense of sensory and info. Memory. Skeletal movement initiate. Sending info to brain parts
What is the role of the brain stem?
life sustaining processes
What are the different parts of the brain stem?
mid brain - auditory and visual reflex. Pons - breathing. Medulla oblongata - the cross of sensory and motor tracts (R to L/ L to R) breathing heart/ vessels swallow cough
What is the role of hypothalamus?
homeostasis by regulating autonomic systems, emotions, hunger/thirst, sleep
