Afferent neurons carry signals to the brain and spinal cord as sensory data. The main cell bodies of afferent neurons are located near the brain and spinal column, which comprise the central nervous system.
What nerves carry information toward the spinal cord?
The PNS nerves convey messages to your central nervous system (CNS), which is the brain and spinal cord. In case you’re wondering, cranial nerves (the ones in your head) supply the sense organs and muscles in your head.
What carries information to the spinal cord?
Information from the skin, skeletal muscle and joints is relayed to the spinal cord by sensory cells located in the dorsal root ganglia. The dorsal root fibers are the axons originated from the primary sensory dorsal root ganglion cells.
What neuron brings messages to the spinal cord?
Most sensory neurons are pseudounipolar, meaning they have an axon that branches into two extensions—one connected to dendrites that receive sensory information and another that transmits this information to the spinal cord.
What are the two types of peripheral nerves?
The peripheral nervous system is divided into two main parts:
- Autonomic nervous system (ANS): Controls involuntary bodily functions and regulates glands.
- Somatic nervous system (SNS): Controls muscle movement and relays information from ears, eyes and skin to the central nervous system.
What is the difference between spinal cord and spinal nerves?
Like the brain, the spinal cord is covered by three layers of tissue (meninges). Spinal nerves: Emerging from the spinal cord between the vertebrae are 31 pairs of spinal nerves. Each nerve emerges in two short branches (roots): One at the front (motor or anterior root) of the spinal cord.
What is the main function of the spinal cord?
The brain and spinal cord are your body’s central nervous system. The brain is the command center for your body, and the spinal cord is the pathway for messages sent by the brain to the body and from the body to the brain.
What is an example of the peripheral nervous system?
The peripheral nervous system includes the cranial nerves, the spinal nerves, the sympathetic nervous system, and the parasympathetic nervous system.
What is the peripheral nervous system comprised of?
Overview. The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.