A cordlike structure of nervous tissue that connects parts of the nervous system with other tissues of the body and conveys nervous impulses to, or away from, these tissues.
A simple or unbranched vein or slender rib. Most commonly refers to a leaf.
Used to distinguish leaf-ribs or veins when parallel, and more or less straight.
A cord-like structure comprising a collection of fibers that convey impulses between a part of the central nervous system and some other region of the body and vice versa.
One or more bundles of fibers that connect the brain and spinal cord (central nervous system) with the rest of the body. Sensory nerves transmit afferent impulses from the sense organs and other organs of the body to the brain and spinal cord. Motor nerves transmit efferent impulses from the brain and spinal cord to the glands, muscles, and other organs of the body. A nerve consists of an epineurium enclosing bundles (fasciculi) of fibers; each fasciculus contains microscopic nerve fibers, each enclosed in a neurolemmal sheath.
A cable of fibers that carries electrochemical impulses to and from the brain or spinal cord to a specific point in the body. The nervous system is a network of nerves passing throughout the body.
A bundle of conducting nerve fibers that transmit impulses from the brain or spinal cord to the muscles and glands (motor nerves) or inward from the sense organs to the brain and spinal cord (sensory nerves). Most large nerves are mixed nerves, containing both motor and sensory nerve fibers running to and from a particular region of the body.
A bundle of conducting fibres called axons that come from neurones the basic units of the nervous system. Nerves make up the central nervous system (brain and spinal cord) and connect that system to all parts of the body, transmitting information from sensory organs via the peripheral nerves to the centre and returning instructions for action to the relevant muscles and glands.
A bundle of neurons that transmits electrochemical impulses between the central nervous system and body tissues. Afferent nerves conduct sensory impulses from receptors to the CNS; efferent nerves conduct motor impulses from the CNS to effector organs and tissues. A peripheral nerve consists of axons of neurons whose cell bodies are located within the brain, the spinal cord, or ganglia. A bundle of nerve fibers is called a fasciculus. The fibers within a fasciculus are surrounded and held together by delicate connective tissue fibers forming the endoneurium. Each fasciculus is surrounded by a sheath of connective tissue (perineurium). The entire nerve is enclosed in a thick sheath of connective tissue (epineurium), which may contain numerous fat cells. Small nerves may lack an epineurium.
A bundle of nerve cells (neurons) that carry electrical signals from one part of the body to another.
Whitish cords made up of bundles of nerve fibers held together by connective tissue, through which impulses are transmitted.
A bundle of nerve fibers (axons). The fibers are either afferent (leading toward the brain and serving in the perception of sensory stimuli of the skin, joints, muscles, and inner organs) or efferent (leading away from the brain and mediating contractions of muscles or organs).
A cluster of nerve fibers converging towards a shared destination. Nerve fibers, also referred to as axons, are the thread-like extensions of numerous individual neurons (nerve cells).
The most evident networks of nerves within the body are the peripheral nerves, extending from the central nervous system (comprising the brain and spinal cord) to various body regions. Among these, there are 12 pairs of cranial nerves directly connected to the brain, and 31 pairs of spinal nerves that link with the spinal cord. In the shoulder and hip areas, spinal nerves combine to form plexuses, from which major nerves extend to the limbs, like the median nerve in the arm and the sciatic nerve in the leg. Most nerves split at multiple points to send branches throughout the body, particularly to sensory organs, the skin, skeletal muscles, internal organs, and glands.
Nerve fibers can serve a sensory role, transmitting information from a receptor or sensory organ towards the central nervous system (CNS). Alternatively, they can serve a motor role, conveying instructions from the CNS to muscles or glands. These messages travel through the fibers as electrical impulses. While some nerves exclusively carry sensory or motor fibers, the majority carry a combination of both.
Nerve functioning is susceptible to cold, pressure, and harm. Peripheral nerves are vulnerable to harm from different conditions, such as infections, inflammation, toxins, deficiencies in nutrients, and metabolic disorders.
A cluster of nerve fiber bundles that transmit either motor signals from the brain to the body’s muscles or sensory signals from various body parts to the brain.