Final Exam Flashcards
Somatic sense are classified into 3 physiological types. What are they?
Mechanoreceptive, Thermoreceptive, Pain receptive
Mechanoreceptive sense include both of these senses
Tactile, position
Thermoreceptive sense includes both of these senses
Heat, cold
Pain sense includes this sense
Any factor that damages the tissues
Tactile senses include
Touch, pressure, vibration, and tickle senses
Position senses include
Static position and rate of movement senses
Exteroreceptive sensations relate to
Sensations from the surface of the body
Proprioceptive sensations relate to
Sensations about the physical state of the body
Deep sensations relate to
Sensations involving muscle or bone, deep pressure, pain and vibration
Visceral sensations relate to
Sensations involving the internal organs
Where are free nerve endings found?
Skin, many other tissues
What do free nerve endings do?
Detect touch and pressure
This is a touch receptor with great sensitivity
Meissner’s Corpuscle
This receptor adapts in a fraction of a second after they are stimulated (A fibers), which means that they are particularly sensitive to movement of objects over the surface of the skin as well as to low-frequency vibration.
Meissner’s Corpuscle
Free Nerve endings has two types of fibers what are they?
A Delta, C Fibers
A delta fibers of FNE are responsible for what senses?
Touch and pressure
C fibers of FNE are responsible for what senses?
Tickle and touch
These respond to low frequency vibrations and discriminate between points touched and textures. They are also rapid adapting
Meissner’s Corpuscle
Meissner’s corpuscles usually also contain large numbers of expanded tip tactile receptors, one type of which is?
Merkel Disc’s
These receptors differ from Meissner’s corpuscles in that they transmit an initially strong but partially adapting signal and then a continuing weaker signal that adapts only slowly. Therefore giving steady-state signals that allow one to determine continuous touch of objects against the skin.
Merkel Disc’s
Merkel’s discs are often grouped together in a
receptor organ called the
Iggo Dome receptor
The entire group of Merkel’s discs is innervated by a single large myelinated nerve fiber this is known as
Alpha(A) beta fiber
Slight movement of any hair on the body stimulates a nerve fiber entwining its base. Thus, each hair and its basal nerve fiber, called THIS, are also a touch receptor.
Hair-end organ
Located in the deeper layers of the skin and also in still deeper internal tissues are many of THESE, which are multibranched, encapsulated
endings
Ruffini endings
These endings adapt very slowly and, therefore, are important for signaling continuous states of deformation of the tissues, such as heavy prolonged touch and pressure signals. They are also found in joint capsules and help to signal the degree of joint rotation.
Ruffini endings
THESE lie both immediately beneath the skin and deep in the fascial tissues of the body. They are stimulated only by rapid local compression of the tissues because they adapt in a few hundredths of a second. Therefore, they are particularly important for detecting tissue vibration or other rapid changes in the mechanical state of the tissues.
Pacinian Corpuscles
