What is a sensory afferent pathway?

Sensory pathways consist of the chain of neurons, from receptor organ to cerebral cortex, that are responsible for the perception of sensations. The 1° afferent is a pseudounipolar neuron that has its cell body located in a peripheral (spinal or cranial) ganglion.

What are afferent and efferent fibers?

Afferent nerve fibers are the axons (nerve fibers) carried by a sensory nerve that relay sensory information from sensory receptors to regions of the brain. Efferent nerve fibers are carried by efferent nerves and exit a region to act on muscles and glands.

What can you infer about the meaning of these two terms afferent and efferent in a structural or anatomical context?

Afferent means “toward,” as in sensory information traveling from the periphery into the CNS. Efferent means “away from,” as in motor commands that travel from the brain down the spinal cord and out into the periphery.

What are afferent and efferent impulses?

Afferent neurons are sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain, while efferent neurons are motor neurons that carry neural impulses away from the central nervous systme and towards muscles to cause movement.

What are sensory and motor pathways?

Motor: The corticospinal tracts send motor information from the cortex to the spinal cord as the name suggests. Sensory: The anterolateral (or spinothalamic) tracts and dorsal (or posterior) column pathways bring sensory input from the spinal cord to the brain by way of the brainstem.

What are motor nerves called?

Motor neurons are also known as efferent neurons, meaning they carry information from the CNS to muscles, and other peripheral systems such as organs and glands. This contrasts with afferent neurons, or sensory neurons, which carry information from sensory organs and tissues back to the CNS.

What is motor nerve Fibre?

1. motor nerve fiber – a neuron conducting impulses outwards from the brain or spinal cord. efferent neuron, motoneuron, motor neuron. nerve cell, neuron – a cell that is specialized to conduct nerve impulses. efferent, efferent nerve, motor nerve – a nerve that conveys impulses toward or to muscles or glands.

What is the target of an upper motor neuron?

The target of the upper motor neuron is the dendrites of the lower motor neuron in the gray matter of the spinal cord. (8) The axon of the lower motor neuron emerges from the spinal cord in a nerve and connects to a muscle through a neuromuscular junction to cause contraction of the target muscle.

What are motor impulses?

Motor, or efferent neurons: carry impulses from the central nervous system to effectors, such as muscles or glands. Interneurons: receive signals from sensory neurons, integrate information and send signals to motor neurons. Somatic fibers relate to the skin and its derivatives, and to voluntary muscles.