Muscles Flashcards
What are the two locations where muscles are attached to bones called?
Origin and insertion
True or False: A muscle can only act on a joint if it crosses that joint.
True
True or False: The hamstrings are a one joint muscle.
False
What actions can you perform with the hip and knee?
Extend the hip and flex the knee separately or together
What are fascial sheaths?
Connective tissue throughout the body that holds together and maintains muscles
Muscles attach to bones through the connective tissue fibers known as _______.
tendons
How can a tendon be best described?
As an extension or part of the muscle
True or False: Tendons have the same contractile elements as muscles.
False
What is the reverse action of contracting a muscle?
Stretching a muscle
To stretch a two-joint muscle effectively, the stretch must be created over _______ joints simultaneously.
both
Muscle fibers can contract to what fraction of their resting length?
One-half
True or False: All muscle units are involved when you contract a muscle.
True
What does muscle tone refer to?
The readiness of a muscle to respond
Motor units fire as a unit, allowing the effect of _______.
smooth movement
What does RYS stand for in the context of yoga?
Registered Yoga School
What is the significance of a motor nerve in muscle contraction?
A muscle receives its stimulation to contract from a motor nerve
What is the single most important factor to understand when analyzing muscle movements?
Force
List the three different functions that muscles can assume.
- Agonist or prime mover
- Antagonist in direct opposition to the agonist
- Neutralizer that prevents one of the actions of an agonist
True or False: Agonists and Antagonists work independently without any interaction.
False
What is the term for the specific way Agonists and Antagonists work together?
Reciprocal innervation
Fill in the blank: A muscle can act as a _______ or prime mover.
[agonist]
Fill in the blank: A muscle can function as an _______ in direct opposition to the agonist.
[antagonist]
Fill in the blank: A muscle can act as a _______ that prevents one of the actions of an agonist.
[neutralizer]
