|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Journal of Experimental Biology, Vol 198, Issue 3 805-815, Copyright © 1995 by Company of Biologists
JOURNAL ARTICLES |
B Jayne and G Lauder
The myomeric axial musculature of fish has a complex three-dimensional morphology, yet within-myomere motor patterns have not been examined to determine whether all portions of each myomere are activated synchronously during locomotion. To gain insight into recruitment patterns in the deep myomeric musculature of fish, we implanted a series of fine-wire electrodes arranged in a vertical row of six electrodes and a longitudinal row of three electrodes on both the left and right sides of each of five largemouth bass (Micropterus salmoides). After recording electromyograms (EMGs) during the burst-and-glide swimming of each fish, post-mortem dissections and X-rays determined the location of electrodes with respect to (1) the longitudinal position (by counting the underlying vertebrae), (2) the position of the myomere containing the electrode, and (3) the portion within each myomere containing an electrode. Because of the convoluted overlapping shape of the myomeres, electrodes within the vertical row of sites could be located in any one of six different myomeres. Thus, we compared muscle activity for locations with a constant longitudinal position and differing myomeric position (vertical row) and among sites with both variable longitudinal and myomeric positions. We detected significant heterogeneity in EMG onset times for sites within the vertical row of electrodes; however, the durations of the EMGs from different sites were similar. EMG onset times at more posterior longitudinal positions preceded those of more anterior longitudinal positions when electrodes of the latter site were within a more posterior myomere. Thus, the timing of EMGs was consistent with the posterior propagation of muscle activity via the sequential activation of myomeres rather than the simultaneous activation of all contractile tissue within the longitudinal span of a single vertebra. In addition, extreme epaxial and hypaxial portions of myomeres showed distinct activity patterns which did not necessarily correlate with activity in the central myomeric fibers nearer the horizontal septum.
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati 
Twitter What's this?
This article has been cited by other articles:
|
|
 |
|
  M. Martinez, H. Guderley, J.-D. Dutil, P. D. Winger, P. He, and S. J. Walsh Condition, prolonged swimming performance and muscle metabolic capacities of cod Gadus morhua J. Exp. Biol., February 1, 2003; 206(3): 503 - 511. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. L. Katz Design of heterothermic muscle in fish J. Exp. Biol., August 1, 2002; 205(15): 2251 - 2266. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. M. Thys, J. M. Blank, D. J. Coughlin, and F. Schachat Longitudinal variation in muscle protein expression and contraction kinetics of largemouth bass axial muscle J. Exp. Biol., March 14, 2002; 204(24): 4249 - 4257. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. J. Ellerby, I. L. Y. Spierts, and J. D. Altringham Fast muscle function in the European eel (Anguilla anguilla L.) during aquatic and terrestrial locomotion J. Exp. Biol., January 7, 2001; 204(13): 2231 - 2238. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. J. Ellerby and J. D. Altringham Spatial variation in fast muscle function of the rainbow trout Oncorhynchus mykiss during fast-starts and sprinting J. Exp. Biol., January 7, 2001; 204(13): 2239 - 2250. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Ellerby, I. Spierts, and J. Altringham Slow muscle power output of yellow- and silver-phase European eels (Anguilla anguilla L.): changes in muscle performance prior to migration J. Exp. Biol., January 4, 2001; 204(7): 1369 - 1379. [Abstract] [PDF]
|
|
|
|
|
|
J. Hove, L. O'Bryan, M. Gordon, P. Webb, and D Weihs Boxfishes (Teleostei: Ostraciidae) as a model system for fishes swimming with many fins: kinematics J. Exp. Biol., January 4, 2001; 204(8): 1459 - 1471. [Abstract] [PDF]
|
|
|
|
|
|
C. Wilga and G. Lauder Three-dimensional kinematics and wake structure of the pectoral fins during locomotion in leopard sharks Triakis semifasciata J. Exp. Biol., January 8, 2000; 203(15): 2261 - 2278. [Abstract] [PDF]
|
|
|
|
|
|
D. Ellerby, J. Altringham, T Williams, and B. Block Slow muscle function of Pacific bonito (Sarda chiliensis) during steady swimming J. Exp. Biol., January 7, 2000; 203(13): 2001 - 2013. [Abstract] [PDF]
|
|
|
|
|
|
J. Van Leeuwen A mechanical analysis of myomere shape in fish J. Exp. Biol., January 12, 1999; 202(23): 3405 - 3414. [Abstract] [PDF]
|
|
|
|
|
|
L. Rosenberger and M. Westneat Functional morphology of undulatory pectoral fin locomotion in the stingray taeniura lymma (Chondrichthyes: dasyatidae) J. Exp. Biol., January 12, 1999; 202(24): 3523 - 3539. [Abstract] [PDF]
|
|
|
|
|
|
H Dewar, M Deffenbaugh, G Thurmond, K Lashkari, and B. Block Development of an acoustic telemetry tag for monitoring electromyograms in free-swimming fish J. Exp. Biol., January 10, 1999; 202(19): 2693 - 2699. [Abstract] [PDF]
|
|
|
|
|
|
E. Drucker and G. Lauder Locomotor forces on a swimming fish: three-dimensional vortex wake dynamics quantified using digital particle image velocimetry J. Exp. Biol., January 9, 1999; 202(18): 2393 - 2412. [Abstract] [PDF]
|
|
|
|
|
|
C. Wilga and G. Lauder Locomotion in sturgeon: function of the pectoral fins J. Exp. Biol., January 9, 1999; 202(18): 2413 - 2432. [Abstract] [PDF]
|
|
|
|
|
|
T Knower, R. Shadwick, S. Katz, J. Graham, and C. Wardle Red muscle activation patterns in yellowfin (Thunnus albacares) and skipjack (Katsuwonus pelamis) tunas during steady swimming J. Exp. Biol., January 8, 1999; 202(16): 2127 - 2138. [Abstract] [PDF]
|
|
|
|
|
|
S. Katz, R. Shadwick, and H. Rapoport Muscle strain histories in swimming milkfish in steady and sprinting gaits J. Exp. Biol., January 3, 1999; 202(5): 529 - 541. [Abstract] [PDF]
|
|
