Fever blisters (or cold sores) are painful sores, which occur on lips, cheeks, chin, fingers, nostrils, or even genitals. These are caused by a virus, named âherpes simplexâ. Fever blisters are contagious and are usually mistaken to be canker sores (which are actually mouth ulcers and occur inside the mouth).
The spinal ganglia or dorsal root ganglia contain the cell bodies of sensory neurons entering the cord at that region. nerve-a group of fibers (axons) outside the CNS. The spinal nerves contain the fibers of the sensory and motor neurons.A nerve does not contain cell bodies.They are located in the ganglion (sensory) or in the gray matter (motor). tract-a group of fibers inside the CNS. The spinal tracts carry information up or down the spinal cord, to or from the brain.he spinal cord is the connection center for the reflexes as well as the afferent (sensory) and efferent (motor) pathways for most of the body below the head and neck. The spinal cord begins at the brainstem and ends at about the second lumbar vertebra.
Targets: Outside the vertebral column, the nerve divides into branches. The dorsal ramus contains nerves that serve the dorsal portions of the trunk, carrying visceral motor, somatic motor, and somatic sensory information to and from the skin and muscles of the back (epaxial muscles).ocation: Each spinal nerve is formed by the combination of nerve fibers from the dorsaland ventral roots of the spinal cord (Figure 0). The dorsal roots carry afferent sensory axons, while the ventral roots carry efferent motor axons.