Feedback
Many biologic processes are controlled by feedback, just as the temperature in a home from a furnace is regulated by a thermostat.
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1. In a given system, the return, as input, of some of the output, as a regulatory mechanism; e.g., regulation of a furnace by a thermostat. 2. An explanation for the learning of motor skills: sensory stimuli set up by muscle contractions modulate the activity of the motor system. 3. The feeling evoked by another person's reaction to oneself. See biofeedback.
- auditory f. the unwanted sound that occurs in an amplification system when the microphone picks up the sound from the speaker; a major problem in the use of hearing aid s.
- negative f. that which occurs if the sign or sense of the returned signal results in reduced amplification.
- positive f. that which occurs when the sign or sense of the returned signal results in increased amplification or leads to instability.
- tubuloglomerular f. a blood flow control mechanism operating in the kidneys that limits changes in glomerular filtration rate.

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feed·back 'fēd-.bak n
1) the return to the input of part of the output of a machine, system, or process (as for producing changes in an electronic circuit that improve performance or in an automatic control device that provide self-corrective action)
2 a) the partial reversion of the effects of a process to its source or to a preceding stage
b) the return to a point of origin of evaluative or corrective information about an action or process <patient \feedback was solicited> also the information so transmitted

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n.
the coupling of the output of a process to the input. Feedback mechanisms are important in regulating many physiological processes; for example, hormone output and enzyme-mediated reactions. In negative feedback, a rise in the output of a substance will inhibit a further increase in its production, either directly or indirectly (see negative feedback loops). In positive feedback, a rise in the output of a substance is associated with an increase in the output of another substance, either directly or indirectly.

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feed·back (fēdґbak) the return of some of the output of a system as input so as to exert some control in the process; see also endproduct inhibition, under inhibition.

Medical dictionary. 2011.

Look at other dictionaries:

  • Feedback — Feedback …   Deutsch Wörterbuch

  • Feedback — Жанр Psychedelic Blues Rock Годы c 2006 Откуда Россия …   Википедия

  • feedback — feed‧back [ˈfiːdbæk] noun [uncountable] 1. HUMAN RESOURCES advice or criticism about how well you are doing your job and what you could do to improve. Managers usually give feedback to their employees: • The line manager judges the trainee s work …   Financial and business terms

  • Feedback — Sn Rückmeldung, Reaktion per. Wortschatz fach. (20. Jh.) Entlehnung. Entlehnt aus ne. feedback, dieses aus ne. feed einspeisen, füttern (aus ae. fēdan; Futter1) und ne. back zurück (Backbord). Zunächst technische Bezeichnung für die Kontrolle von …   Etymologisches Wörterbuch der deutschen sprache

  • feedback — s.n. (cib., psih.) Retroacţiune (1) care se manifestă la nivelul a diferite sisteme (biologice, tehnice etc.) în scopul menţinerii stabilităţii şi echilibrului lor faţă de influenţe exterioare; retroacţiune inversă, conexiune inversă, cauzalitate …   Dicționar Român

  • Feedback — Feedback: Das Fremdwort, das allgemeinsprachlich in der Bedeutung »Rückmeldung, Reaktion« verwendet wird, wurde in der Mitte des 20. Jh.s aus dem Engl. übernommen. Bei dem gleichbed. engl. feedback handelt es sich um eine Substantivierung des… …   Das Herkunftswörterbuch

  • feedback — developed its meaning in general use, ‘information about something from the people that have used it or been involved in it, as a basis for improving it’, in the 1960s: • They would like feedback from the last issue, articles from individuals and …   Modern English usage

  • feedback — n. 1. the process in which part of the output of a system is returned to its input. [WordNet 1.5] 2. response to an inquiry or experiment. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • feedback — (izg. fȋdbēk) m DEFINICIJA 1. tehn. a. povrat podataka o rezultatu nekog procesa, događaja i sl., posebno potreban da bi se obavio popravak ili kontrola; retroakcija b. na taj način prikupljeni podaci 2. lingv. u međuljudskoj komunikaciji… …   Hrvatski jezični portal

  • feedback — (ingl.; pronunc. [fíd bác]) m. Retroalimentación. * * * (voz inglesa) ► masculino LINGÜÍSTICA Funcionamiento de un sistema de comunicación estimulado por los resultados de la acción del mismo sistema …   Enciclopedia Universal

  • feedback — / fi:dbæk/, it. /fid bɛk/ s. ingl. [comp. di feed alimento e back indietro , propr. alimentazione retroattiva ], usato in ital. al masch. (tecnol.) [processo per cui l effetto risultante dall azione di un sistema (meccanismo, circuito e sim.) si… …   Enciclopedia Italiana

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