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Questions and Answers
Neuromuscular control is the control of human movement by a complex interaction between the ______ and muscle systems
Neuromuscular control is the control of human movement by a complex interaction between the ______ and muscle systems
neural
High ______ during movement is at the beginning of learning new tasks and results in increases in errors executing movements
High ______ during movement is at the beginning of learning new tasks and results in increases in errors executing movements
variability
As movements are practiced, the ______ decreases and the movement becomes more accurate and 'patterned'
As movements are practiced, the ______ decreases and the movement becomes more accurate and 'patterned'
variability
Some ______ in movement is a good thing, as it can help reduce the risk of injury due to repetitive loading patterns
Some ______ in movement is a good thing, as it can help reduce the risk of injury due to repetitive loading patterns
Motor learning is the adaptation of ______ of movement that occurs with task rehearsal
Motor learning is the adaptation of ______ of movement that occurs with task rehearsal
Initial performance gains in strength training are initially due to ______ adaptations before hypertrophy occurs.
Initial performance gains in strength training are initially due to ______ adaptations before hypertrophy occurs.
Neuromuscular adaptations is a development of a pattern of repeated movements resulting in more ______ movement
Neuromuscular adaptations is a development of a pattern of repeated movements resulting in more ______ movement
Those with ______ have exhibited altered neuromuscular control in comparison to healthy individuals.
Those with ______ have exhibited altered neuromuscular control in comparison to healthy individuals.
Muscle acts in a ______ force and creates motion cause it crosses one or two joints.
Muscle acts in a ______ force and creates motion cause it crosses one or two joints.
The functional effect produced by a ______ muscle force is called a torque.
The functional effect produced by a ______ muscle force is called a torque.
Skeletal muscle does: production of ______ movement, maintain posture and enhance joint stability.
Skeletal muscle does: production of ______ movement, maintain posture and enhance joint stability.
EMG can look at the relationship between different muscles as a ______ diagram.
EMG can look at the relationship between different muscles as a ______ diagram.
Groups of muscles are within ______ that are then surrounded by fascia.
Groups of muscles are within ______ that are then surrounded by fascia.
The exact mechanical interaction depends on the ______ that is being applied or generated.
The exact mechanical interaction depends on the ______ that is being applied or generated.
Hill's Muscle Model consists of Contractile component, Parallel elastic component, and Series elastic component, which includes the ______.
Hill's Muscle Model consists of Contractile component, Parallel elastic component, and Series elastic component, which includes the ______.
Muscle force varies in proportion to the amount of overlap between ______ and myosin filaments.
Muscle force varies in proportion to the amount of overlap between ______ and myosin filaments.
Muscle morphology is one of the factors influencing ______ generation.
Muscle morphology is one of the factors influencing ______ generation.
The ______ tension relationship represents the static capability of a muscle and indicates the force that muscle can exert at different lengths.
The ______ tension relationship represents the static capability of a muscle and indicates the force that muscle can exert at different lengths.
Translating to an angle ______ relationship is confounded by three factors:
Translating to an angle ______ relationship is confounded by three factors:
By applying a quick ______ to muscle while it's contracting an additional force can be generated.
By applying a quick ______ to muscle while it's contracting an additional force can be generated.
Negative work: while being ______, the muscle is lengthening and therefore, negative work is being performed and energy is being absorbed.
Negative work: while being ______, the muscle is lengthening and therefore, negative work is being performed and energy is being absorbed.
Aging increases ______ stiffness and increases risk of injury.
Aging increases ______ stiffness and increases risk of injury.
The ability to produce max ______ in a muscle is affected by the velocity of the contraction.
The ability to produce max ______ in a muscle is affected by the velocity of the contraction.
The greatest ______ are achieved when being actively stretched under load.
The greatest ______ are achieved when being actively stretched under load.
Resistive force increases with increasing ______ velocity, thus, in concentric contraction, the viscous damping decreases the net force output by muscle.
Resistive force increases with increasing ______ velocity, thus, in concentric contraction, the viscous damping decreases the net force output by muscle.
Cross bridge recycling occurs with greater frequency with increasing ______ of concentric or eccentric contraction.
Cross bridge recycling occurs with greater frequency with increasing ______ of concentric or eccentric contraction.
Power is the rate that ______ can be performed, important in high performance sport.
Power is the rate that ______ can be performed, important in high performance sport.
Force decreases with increasing ______ and vice versa.
Force decreases with increasing ______ and vice versa.
One can't determine the function or contribution of a muscle to a joint movement by looking at the ______ points.
One can't determine the function or contribution of a muscle to a joint movement by looking at the ______ points.
Most muscles only cross ______ joint.
Most muscles only cross ______ joint.
Power = ______ x velocity
Power = ______ x velocity
In the case of eccentric contraction, greater ______ is required to stretch and break the cross bridge bonds with increasing lengthening velocity
In the case of eccentric contraction, greater ______ is required to stretch and break the cross bridge bonds with increasing lengthening velocity
The ability to produce max ______ in a muscle is affected by the velocity of the contraction
The ability to produce max ______ in a muscle is affected by the velocity of the contraction
The functional effect produced by a ______ muscle force is called a torque
The functional effect produced by a ______ muscle force is called a torque
In concentric contraction, the viscous damping decreases the net ______ output by muscle
In concentric contraction, the viscous damping decreases the net ______ output by muscle
There is an optimum ______ velocity that maximises power output
There is an optimum ______ velocity that maximises power output
Aging increases muscular ______ and increases risk of injury.
Aging increases muscular ______ and increases risk of injury.
The ability to produce max force in a muscle is affected by the ______ of the contraction.
The ability to produce max force in a muscle is affected by the ______ of the contraction.
Groups of muscles are controlled by a single muscle to move most body ______.
Groups of muscles are controlled by a single muscle to move most body ______.
The functional effect produced by a muscle force is called a ______.
The functional effect produced by a muscle force is called a ______.
The shape of the angle ______ relationship varies amongst muscles.
The shape of the angle ______ relationship varies amongst muscles.
The faster the movement is, the harder it is to produce max ______.
The faster the movement is, the harder it is to produce max ______.
Muscles may produce very ______ and fine or very large and powerful movement.
Muscles may produce very ______ and fine or very large and powerful movement.
Force generation: tendons and muscles work together to absorb or generate ______.
Force generation: tendons and muscles work together to absorb or generate ______.
The exact mechanical interaction depends on the force that is being applied or generated, the speed of the muscle action and the ______ in the tendon.
The exact mechanical interaction depends on the force that is being applied or generated, the speed of the muscle action and the ______ in the tendon.
Muscle force varies in proportion to the amount of overlap between actin and myosin ______.
Muscle force varies in proportion to the amount of overlap between actin and myosin ______.
The functional effect produced by a muscle force is called a ______.
The functional effect produced by a muscle force is called a ______.
The ability to produce max force in a muscle is affected by the ______ of the contraction.
The ability to produce max force in a muscle is affected by the ______ of the contraction.
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Study Notes
Neuromuscular Control and Learning
- Neuromuscular control involves a complex interaction between the nervous system and muscle systems to manage human movement.
- High errors in movement execution are common at the beginning of learning new tasks, leading to decreased accuracy initially.
- As practice continues, movement errors decrease, resulting in more accurate and 'patterned' movements.
- Allowing some variability in movement is beneficial as it helps minimize the risk of injury from repetitive loading patterns.
- Motor learning entails adaptation in movement patterns occurring through task rehearsal.
Muscle Function and Adaptations
- Initial strength training performance gains are primarily due to neuromuscular adaptations before muscle hypertrophy begins.
- Neuromuscular adaptations develop patterns of repeated movements, resulting in improved movement efficiency.
- Individuals with specific neuromuscular disorders exhibit altered control compared to healthy individuals.
- Muscle generates force when crossing one or two joints; this motion creates torque.
- Skeletal muscle is essential for movement production, maintaining posture, and enhancing joint stability.
Muscle Interaction and Mechanics
- Electromyography (EMG) analyzes the relationship between different muscle groups and their functions.
- Muscle groups form within compartments surrounded by fascia, affecting mechanical interaction.
- Hill's Muscle Model consists of components that detail muscle function and behavior under load.
- Muscle force is related to the degree of overlap between actin and myosin filaments, which influences force generation.
Force Relationships and Aging Effects
- The length-tension relationship indicates a muscle's static capability and force exertion at varying lengths.
- Certain factors complicate the translation to an angle-velocity relationship in muscle dynamics.
- Applying rapid tension to a contracting muscle can increase generated force.
- Negative work occurs during lengthening contractions where energy is absorbed, increasing injury risk as aging leads to stiffer muscles.
Performance Factors
- Maximum muscle force production is influenced by contraction velocity; greater velocity can yield higher power output but may decrease overall force.
- Elastic properties of muscles and tendons play crucial roles in mechanical interactions during movement.
- Power is defined as the rate at which work is done, crucial for high-performance sports activities.
- Understanding joint mechanics requires analysis beyond just muscle attachment points, with most muscles crossing a single joint.
Muscle Behavior and Force Generation
- Eccentric contractions require greater force to stretch and disrupt cross-bridge bonds, especially with increasing lengthening velocity.
- There exists an optimal velocity for maximizing power output during contractions.
- The interaction between tendons and muscles is vital for energy absorption and generation during movement.
- Muscle force varies with the degree of actin-myosin overlap, which is essential for effective force generation.
Summary of Muscle Dynamics
- The functional effect of muscle force is identified as torque, vital for joint movement.
- Force generation efficiency varies with movement speed, with considerations for both fine and powerful movements.
- The relationship between muscle contraction dynamics is pivotal for designing effective training and rehabilitation protocols.
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