A old person......or a disabled person
Delta is a type of fibre that transmits signals that are interpreted and perceived as pain.
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Delta fibres</h3>
A delta fibres (also known as A fibres) are a type of sensory fibre. They respond to cold and pressure stimuli, and as nociceptors, their stimulation is perceived as fast/first pain input. Because they are thinly myelinated, they transmit impulses quicker than unmyelinated C fibres but slower than other, thicker myelinated "A" class fibres.
Structure
They have myelinated axons that are thin (2 to 5 m in diameter) and have a moderate conduction velocity, or speed at which a nerve signal moves (2 to 30 m/s). These nerve fibres make up the afferent portion of the reflex arc that causes the body to "draw away" from noxious stimuli because they are linked to acute (sharp) pain (e.g. retracting your hand away from a hot stove). A part of A fibres is also linked to pressure and temperature perception (also known as "cold receptors" in mammals). Contrarily, slow-conducting, unmyelinated C fibres convey gradual, scorching pain.
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In a fibrous joint, bones are held together by dense connective tissue called ligament that contains many fibers of the protein.
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What is ligament?</h3>
A ligament is a fibrous connective tissue that connects bones and serves to hold tissues together and stabilize them.
A ligament can be ripped or strained. A sprain is the medical term for this type of damage. It happens when a ligament is forced to stretch too far or moves in the wrong direction. Sprains commonly occur as a result of a rapid fall, twist, or collision.
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