What is sensory range fractionation?

Range fractionation is a term used in biology used to denote varying firing thresholds for different stimuli intensities. Sense organs are usually composed of many sensory receptors measuring the same property. These sensory receptors show a limited degree of precision due to an upper limit in firing rate.

How does range fractionation improve the dynamic range?

How does range fractionation improve the dynamic range? Sensory neurons change their firing rates to encode stimulus intensity. A higher intensity stimulus generally results in a higher frequency of firing, while a lower-intensity stimulus results in a lower frequency of firing.

What is fractionation in physiology?

Fractionation is the mechanism in which the total dose is split into multiple treatments to allow for normal tissue recovery. From: Encyclopedia of Respiratory Medicine(Second Edition), 2022.

What are phasic and tonic receptors?

Phasic receptors adapt rapidly and inform, therefore, about the rate of change of a stimulus. Tonic receptors adapt slowly and inform about the presence and strength of a stimulus. Many sensory neurons may unify both response properties and are called phasic-tonic receptors.

How does range fractionation work?

a hypothesis of perception of stimulus intensity, stating that a wide range of intensity values can be encoded by a group of cells, each of which is a specialist for a particular range of stimulus intensities.

What is the range fractionation hypothesis?

What is the purpose of fractionation?

Fractionation makes it possible to isolate more than two components in a mixture in a single run. This property sets it apart from other separation techniques.

What is the difference between phasic and tonic?

Phasic muscles are action muscles and use force when needed. Tonic muscles are slow twitch, meaning they can stay “on” for long periods of time. Tonic muscles are closer to the joints, they have great endurance, are oxygen fed, and are well integrated with the brain and vestibular system.

What are the 4 types of mechanoreceptors?

Four major types of encapsulated mechanoreceptors are specialized to provide information to the central nervous system about touch, pressure, vibration, and cutaneous tension: Meissner’s corpuscles, Pacinian corpuscles, Merkel’s disks, and Ruffini’s corpuscles (Figure 9.3 and Table 9.1).

What does thermoreceptor mean?

Thermoreceptors are free nerve endings that reside in the skin, liver, and skeletal muscles, and in the hypothalamus, with cold thermoreceptors 3.5 times more common than heat receptors.