A mathematical model of heterogeneous behavior of single muscle fibres

1986 ◽  
Vol 24 (1) ◽  
pp. 103-118 ◽  
Author(s):  
Pierluigi Colli
Keyword(s):  
Mathematical Model ◽  
Muscle Fibres ◽  
Single Muscle ◽  
Heterogeneous Behavior

scholarly journals Twitch and Tetanic Tension during Culture of Mature Xenopus laevis Single Muscle Fibres

2001 ◽  
Vol 109 (5) ◽  
pp. 410-417 ◽  
Author(s):  
R.T. Jaspers ◽  
H.M. Feenstra ◽  
M.B.E. Lee-de Groot ◽  
P.A. Huijing ◽  
W.J. van der Laarse
Keyword(s):  
Xenopus Laevis ◽  
Muscle Fibres ◽  
Single Muscle ◽  
Tetanic Tension

Absolute values of myothermic measurements on single muscle fibres from frog

1986 ◽  
Vol 7 (4) ◽  
pp. 327-332 ◽  
Author(s):  
N. A. Curtin ◽  
J. V. Howarth ◽  
J. A. Rall ◽  
M. G. A. Wilson ◽  
R. C. Woledge
Keyword(s):  
Muscle Fibres ◽  
Single Muscle

scholarly journals Caffeine and the contractility of single muscle fibres from the barnacleBalanus nubilus

1977 ◽  
Vol 269 (2) ◽  
pp. 421-439 ◽  
Author(s):  
C. C. Ashley ◽  
J. C. Ellory ◽  
P. J. Griffiths
Keyword(s):  
Muscle Fibres ◽  
Single Muscle

scholarly journals The neuropeptide proctolin induces phosphorylation of a 30 kDa protein associated with the thin filament in crustacean muscle

2001 ◽  
Vol 204 (15) ◽  
pp. 2627-2635 ◽  
Author(s):  
Berit Brüstle ◽  
Sabine Kreissl ◽  
Donald L. Mykles ◽  
Werner Rathmayer
Keyword(s):  
Molecular Mass ◽  
Thin Filament ◽  
Troponin I ◽  
Extensor Muscle ◽  
Apparent Molecular Mass ◽  
Muscle Fibres ◽  
Single Pair ◽  
Myofibrillar Proteins ◽  
Single Muscle ◽  
Western Blots

SUMMARYIn the isopod Idotea emarginata, the neuropeptide proctolin is contained in a single pair of motoneurones located in pereion ganglion 4. The two neurones supply dorsal extensor muscle fibres of all segments. Proctolin (1μmoll−1) potentiates the amplitude of contractures of single extensor muscle fibres elicited by 10mmoll−1 caffeine. In western blots of myofibrillar proteins isolated from single muscle fibres and treated with an anti-phosphoserine antibody, a protein with an apparent molecular mass of 30kDa was consistently found. The phosphorylation of this protein was significantly increased by treating the fibres with proctolin. After separation of myofibrillar filaments, a 30kDa protein was found only in the thin filament fraction. This protein is phosphorylated and detected by an antiserum against crustacean troponin I.

Motor Control of Tail Spine Rotation of the Horseshoe Crab, Limulus Polyphemus

1973 ◽  
Vol 58 (3) ◽  
pp. 599-625
Author(s):  
GERALD E. SILVEY
Keyword(s):  
Firing Pattern ◽  
Horseshoe Crab ◽  
Limulus Polyphemus ◽  
Muscle Fibres ◽  
Single Muscle ◽  
Nerve Fibres ◽  
Clockwise Rotation ◽  
Motor Programs ◽  
A Minor ◽  
Large Neurons

1. Limulus polyphemus (L.), the horseshoe crab, rotates its tail spine in order to right tself and to keep itself balanced. 2. Eight muscles, discrete bundles of muscle fibres, move the tail spine. Fibres of the muscles contract in sequence and thereby pull consecutively on the several tendons of each muscle in order to rotate the tail spine in either a clockwise or counter-clockwise direction. 3. Motoneurones in nerves to different muscles, fibres within a muscle and units in a nerve to a single muscle fire in different sequences during clockwise and counter-clockwise rotation of the tail spine. 4. The firing pattern consists of a major burst of small to large neurons which fire in clusters, and a minor burst of small neurones which appear to fire randomly. Motoneurones in both bursts are excitatory. The major burst develops tension, the minor burst acts during extension of the muscle and presumably impedes relaxation in order to produce stable deflexion and smooth rotation of the tail spine. 5. Muscle fibres respond to motor output with small excitatory junctional potentials of < 5 mV. E.j.p.s sum and show facilitation, and in some cases develop spike-like potentials of 10-20 mV. Both spiking and the greatest increase in tension occur during the clustered firings in major bursts. 6. Muscle fibres have sarcomere lengths of 6·5±0·8 µm and diameters of 10·60 µm. Nerve fibres range from less than 3 to 32 µm in diameter in large nerve branches, which contain between 50 and 100 fibres. 7. These findings indicate that two different motor programs evoke contraction of muscle fibres in opposite sequences. Sequential contraction of fibres within a muscle means that muscle fibres which are activated together, rather than whole muscles, are the functional contractile entities.

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