nervous system organisations Flashcards
(13 cards)
4 lobes of the cerebral cortex
1)frontal lobe
2)pariental lobe
3)temporal lobe
4)occipital lobe
1)
frontal lobe functions
1) prefrontal cortex
2) motor cortex
3) brocas area
1) problem solving, personality
2) planning, control and execution of voluntary movment
3) production of speech
pariental lobe functions
-primary somatosensory cortex
-posteroir parietal cortex
processes sensory information
occipital lobe function
-where is it located around
visual processing centre in brain
-located around calcarine sulcus
temporal lobe functions
-auditory cortex
-1) wernickes area
processes auditory information
1) language comprehension
what does the PNS consist of, that it connects the CNS to the body
-cranial nerves
-spinal nerves
-cranial nerves arise from brain stem and brain
spinal nerves arise from spinal cord
function of cranial nerves
-how many pairs
-the types
function= control sensory and motor function of head and neck
-12 pairs
-sensory, motor and mixed
function of spinal nerves
-how many pairs of nerves
-type of nerves
control sensory and motor functions of the body
-31 pairs of nerves
-all mized nerves which carry both sensory and motor signals
difference between monosynaptic and polysynaptic in somatic reflex arc
monosynaptic= one synapse between a sensory (afferent) and motor (efferen) neuron. no interneurons
polysynaptic= one or more interneurons connect afferent and efferent neurons
example of monosynaptic reflexes (closed loop)
e.g. knee jerk reflex
muscle stretch leads to muscle contraction due to muscle spindle detecting stretch.
causes a response which ACTS on stimuli
1.
example of polysynaptic reflexes (open loop)
e.g. flexion (withdrawl) reflex.
protection from harmful stimuli.
stimulus feedback has NO EFFECT on stimulus
function of crossed extensor reflex
-stimulus causes flexion of leg (withdrawl)
-helps maintain balance when one leg is extended
The integration centre in a simple reflex arc is typically located in:
spinal cord
