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Free nerve endings are unencapsulated and have no complex sensory structures. They are the most common type of nerve ending, and are most frequently found in the skin. They penetrate the dermis and end in the stratum granulosum. FNEs infiltrate the middle layers of the dermis and surround hair follicles.
Viruses that cause viral encephalitis first infect the body and replicate outside of the central nervous system (CNS). Thereafter, most reach the spinal cord and brain via the circulatory system. Exceptions to this include herpesviruses and the rabies virus, which travel from nerve endings to the CNS.
The central nervous system (CNS) controls most of the functions of the body and mind. It comprises the brain, spinal cord and the nerve fibers that branch off to all parts of the body. The CNS viral diseases are caused by viruses that attack the CNS. Existing and emerging viral CNS infections are major sources of human morbidity and mortality.
Allodynia can also be caused when a nociceptor is damaged in the peripheral nerves. This can result in deafferentation, which means the development of different central processes from the surviving afferent nerve. With this situation, surviving dorsal root axons of the nociceptors can make contact with the spinal cord, thus changing the normal ...
Area of the human body surface innervated by each spinal nerve. Even mammals, including humans, show the segmented bilaterian body plan at the level of the nervous system. The spinal cord contains a series of segmental ganglia, each giving rise to motor and sensory nerves that innervate a portion of the body surface and underlying musculature.
The clitoris has more than 10,000 nerve endings. ... Smegma is not contagious nor is it a sexually transmitted infection. However, it can build up and make it difficult to retract the clitoral ...
Neuroinflammation is widely regarded as chronic, as opposed to acute, inflammation of the central nervous system. [5] Acute inflammation usually follows injury to the central nervous system immediately, and is characterized by inflammatory molecules, endothelial cell activation, platelet deposition, and tissue edema. [6]
In addition to dryness, the muscles at the opening of the vagina contract to prevent painful penetration,” Dr. Streicher explains. Often women blame vaginal burning on a urinary tract infection ...