This neurotransmitter causes an inhibitory postsynaptic potential in the postsynaptic neuron. The neurotransmitter then binds to receptors located on the postsynaptic neuron. Typically, neurotransmitter molecules are released by the presynaptic neuron. These potentials alter the chances of an action potential occurring in a postsynaptic neuron. This causes a final depression on the activity of the postsynaptic neuron. Rather, it depends on the class of chemical receptors present on the postsynaptic neuron. Each is connected to a sensory neuron. It is one of the characteristic responses of an upper motor neuron lesion. The perceptron is a simplified model of a biological neuron. These findings are in contrast to findings in upper motor neuron lesions. The first gene family was identified as the Protocadherins which are attributed to neuron development. It works like an anesthetic by decreasing the permeability of neuron membranes. It belongs to a group of disorders known as motor neuron diseases. This is a test of upper motor neuron disease. PLS belongs to a group of disorders known as motor neuron diseases.