Related Experiment Video
Updated: Jun 1, 2026
10:19
Studying the Neural Basis of Adaptive Locomotor Behavior in Insects
Published on: April 13, 2011
Congruence between muscle activity and kinematics in a convergently derived prey-processing behavior
Nicolai Konow1, Ariel L Camp, Christopher P J Sanford
1Department of Biology, 114 Hofstra University, Hempstead, NY 11549, USA.
Integrative and Comparative Biology
|June 15, 2011
Summary
This study reveals how musculoskeletal system adaptations drive diverse feeding behaviors in fish. Chitala ornata uses elastic recoil for modulated raking, while Salvelinus fontinalis shows unmodulated kinematics.
Area of Science:
- Biomechanics and functional morphology
- Comparative physiology
- Evolutionary biology
Background:
- Understanding the musculoskeletal system's role in behavioral diversity is crucial.
- Investigating how morphology, biomechanics, kinematics, and muscle activity patterns (MAPs) influence behavior.
- Examining novel feeding behaviors in distinct evolutionary lineages.
Purpose of the Study:
- To identify patterns of congruence in how organizational levels drive behavioral modulation.
- To analyze a novel raking prey-processing behavior in two teleost lineages.
- To compare the musculoskeletal adaptations for raking in Chitala ornata and Salvelinus fontinalis.
Main Methods:
- Electromyography to record muscle activity patterns (MAPs).
- Sonomicrometry to measure muscle length dynamics and joint kinesis.
- Analysis of cranial morphology and kinematics.
- Feeding experiments with divergent prey types (goldfish and earthworms).
Main Results:
- Salvelinus fontinalis raking relies on an elongated cranial out lever and unmodulated MAPs and kinematics.
- Chitala ornata exhibits modulated raking MAPs with muscle activity overlap and uses elastic recoil via the protractor hyoideus muscle.
- Chitala ornata's raking involves pectoral girdle retraction and utilizes stored elastic energy for enhanced basihyal retraction.
Conclusions:
- Musculoskeletal system design and function enable performance-enhancing modulation in Chitala ornata's raking.
- Divergent evolutionary pathways lead to distinct raking strategies in teleosts.
- The study highlights a unique elastic recoil mechanism for modulating feeding behavior in Chitala ornata.
Related Concept Videos
01:20Excitation-Contraction Coupling in Skeletal Muscles
Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action potential...
When an action potential...
02:39Predator-Prey Interactions
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
01:24Muscle Coordination and Action
Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.
01:20Motor Unit Stimulation
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
01:15Muscle Contraction
01:24Generation of Action Potential in Skeletal Muscles
Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the cell's...
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the cell's...