5 Steps of Neural Reflex

Steps of Neural Reflex

• Step 1: Arrival of Stimulus

  • Initiates reflex action by detecting a stimulus at the receptor level.
  • Involves physical or chemical changes in the environment that trigger the response.

• Step 2: Activation of Sensory Neurons

  • Sensory neurons are activated leading to graded depolarization.
  • This signal transmits sensory information towards the central nervous system.

• Step 3: Information Processing by Postsynaptic Cell

  • The postsynaptic cell processes incoming signals.
  • This processing results from neurotransmitter release, influencing the postsynaptic neuron's excitability.

• Step 4: Activation of Motor Neuron

  • Motor neurons are activated and generate an action potential.
  • This action potential carries the response signal away from the central nervous system to effectors.

• Step 5: Response of Peripheral Effector

  • The final step involves the action of peripheral effectors such as muscles or glands.
  • This results in a physiological response to the initial stimulus, completing the reflex arc.