Biomaterial Database

Force-velocity properties of fast-twitch and slow-twitch muscles of the kitten. 1985

D D Hatcher, and A R Luff

The characteristics of the isometric and force-velocity properties of the fast-twitch flexor digitorum longus (f.d.l.) and the slow-twitch soleus muscles of the developing kitten were determined at post-natal ages of 2 days and 1,2,4 and 6 weeks. The contractile properties of the isometric twitch and tetanus were similar to those previously reported by other authors. The minimum stimulation frequency required for isotonic contractions to achieve the maximum speed of shortening at any given load was 200 Hz for f.d.l. and 150 Hz for soleus at all ages. The extrapolated maximum speed of sarcomere (sarc.) shortening (Vmax) was significantly different between the f.d.l. (22.3 microns s-1 sarc.-1) and soleus (13.1 microns s-1 sarc.-1) at 2 days of age. The f.d.l. Vmax achieved adult values by 4 weeks of age, while there was little or no change in the soleus Vmax. The force-velocity properties are discussed and compared to the changes which have been observed in other contractile properties of the cat f.d.l. and soleus muscles.

UI	MeSH Term	Description	Entries
D007537	Isometric Contraction	Muscular contractions characterized by increase in tension without change in length.	Contraction, Isometric,Contractions, Isometric,Isometric Contractions
D007551	Isotonic Contraction	Muscle contraction with negligible change in the force of contraction but shortening of the distance between the origin and insertion.	Contraction, Isotonic,Contractions, Isotonic,Isotonic Contractions
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D006614	Hindlimb	Either of two extremities of four-footed non-primate land animals. It usually consists of a FEMUR; TIBIA; and FIBULA; tarsals; METATARSALS; and TOES. (From Storer et al., General Zoology, 6th ed, p73)	Hindlimbs
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001696	Biomechanical Phenomena	The properties, processes, and behavior of biological systems under the action of mechanical forces.	Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D012518	Sarcomeres	The repeating contractile units of the MYOFIBRIL, delimited by Z bands along its length.	Sarcomere
D024510	Muscle Development	Developmental events leading to the formation of adult muscular system, which includes differentiation of the various types of muscle cell precursors, migration of myoblasts, activation of myogenesis and development of muscle anchorage.	Myofibrillogenesis,Myogenesis,Muscular Development,Development, Muscle,Development, Muscular