The next reflex is the flexor reflex.
The flexor reflex causes withdrawal
of a limb to avoid injury or pain.
Think of this reflex, we are thinking of
touching a hot stove or stepping on a nail.
In this reflex, the sensory impulse
is going to be something of pain
and the dendrites of pain sensitive neurons
are going to send that sensory information
to the sensory neuron which is
going to then go to the spinal cord
And then at the spinal cord, you
will get integration of the signal.
Now this is a little different
than what we've seen before
and that the flexor reflex is
going to be intersegmental.
The reason why is because this reflex is
going to require us to move the whole leg
or in the case of touching a
hot pan, move the whole arm.
And because of that, we're going to
have to contract multiple muscle groups
and so you will have interneurons that descend
from where the sensory neuron took place
ascend from where the
sensory neuron took place
and as well as the interneuron in the actual
synapses where the sensory neuron comes in.
Following this, a nerve impulse is then sent
to the motor neurons toward the effector.
At the effector, the flexor
muscle is going to contract
causing the leg to
withdraw away from the pain
or in the case of touching a hot stove or a
hot pan, withdraw the arm away from the pan.