Motor, sensory and Interneurons

Sensory Neurons (Afferent Neurons) Function

Responsible for carrying sensory information toward the Central Nervous System (CNS).

Sensory Neurons (Afferent Neurons) Pathway

Transmit signals from sense receptors (e.g., in the skin, eyes, ears) to the CNS.

Sensory Neurons (Afferent Neurons) Characteristics

Afferent neurons that conduct impulses from peripheral receptors toward the CNS. They convey information like temperature, pain, and touch to the brain for processing.

Motor Neurons (Efferent Neurons) Function

Carry signals away from the CNS to the muscles and glands.

Motor Neurons (Efferent Neurons) Pathway

These neurons transmit impulses from the CNS to effector organs (e.g., muscles and glands) to stimulate actions, such as muscle contraction or gland secretion.

Motor Neurons (Efferent Neurons) Characteristics

Efferent neurons that conduct signals away from the CNS. They allow voluntary muscle movements by sending signals to the skeletal muscles or control involuntary actions in smooth muscles and glands.

Interneurons Function

Act as connectors or intermediaries between sensory and motor neurons within the CNS.

Interneurons Pathway

They process information received from sensory neurons and determine appropriate responses, often communicating between the brain and spinal cord.

Interneurons Characteristics

Neither carry signals directly to sense receptors nor to muscles; instead, they serve to relay information and form complex networks within the CNS. They are key in reflex actions, such as the withdrawal reflex, where they facilitate a quick response to a painful stimulus without direct brain involvement.

Role in Reflex: Sensory Neurons

Detect stimuli

Role in Reflex: Interneurons

Process the signal

Role in Reflex: Motor Neurons

Activate a quick response