PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2007 | 67 | 1 |
Tytuł artykułu

Tetanic potentiation in motor units of rat medial gastrocnemius

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Tetanic potentiation is a phenomenon, which expresses the ability of a motor unit (MU) to increase its force output in tetanic contractions above that predicted with an assumption of algebraic summation of single twitch responses. To quantify tetanic potentiation, a coefficient TPC (tetanic potentiation coefficient) was defined as a ratio of the areas below tetanic force recording corresponding to the single stimulus contribution and that of the single twitch. Single MUs (27 Slow, 71 Fast, Fatigue Resistant, and 47 Fast, Fatigable) were isolated from the rat medial gastrocnemius muscle (MG) by ventral root splitting. TPC value was rate-dependent, with the maximum TPCmax at a certain optimal rate. The largest values of the TPCmax were obtained in the weakest and most fatigue resistant (S and weak FR) MUs. The different manifestation of staircase effect, post-tetanic and tetanic potentiation in individual MU types indicates that these phenomena may be independent of each other. We suggest that these phenomena as well as the fatigue resistance should be reexamined with protocols adjusted to the MU optimal frequency.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
67
Numer
1
Opis fizyczny
p.35-42,fig.,ref.
Twórcy
  • Institute of Biocybernetics and Biomedical Engineering, Ks.Trojdena 4 St., 02-109 Warsaw, Poland
  • Department of Neurobiology, University School of Physical Education, Grunwaldzka 55 St., 60-352 Poznan, Poland
Bibliografia
Uwagi
PL
Rekord w opracowaniu
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-ca37eca3-433b-4378-ae33-6d2b59fd8111
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.