Kinetics, Biomechanics & Myology Flashcards
What are antagonistic and agonist muscles?
Agonist muscles (or prime movers) produce movement. Antagonist muscles move the body part back to its original position.
What is a synergist muscle?
Muscles which act on movable joints, sometimes referred to as neutralizers (i.e. at knee in Trikonasana to stop from over extending).
What are the 3 different types of muscle tissue in the body?
- Skeletal Muscle Voluntary
- Smooth Muscle involuntary (lining the walls of internal organs stomach, intestines & uterus
- Cardiac Muscle (only in the heart also involuntary)
How does Skeletal Muscle work?
Voluntary muscles that you think about contracting and the nervous system tells them to.
Anchored to bone via tendons & designed to generate skeletal movement
When contracted, the bundles of fibres overlap increases.
When stretched, the overlap of fibres decreases.
Some fibres shorten, lengthen, others may remain at rest
What is the relationship between muscles and the nervous system?
Movement of Muscles is coordinated and controlled by the nervous system, that sends a message to the muscles (from motor cortex to spinal cord to nerves in the body) ‘telling’ it them move
What are efferent messages and afferent messages?
Efferent - travel from brain > nerves > muscle receptors
Afferent - travel from muscle receptors > nerves > spinal cord > brain
What does the Central Nervous System consist of?
The brain and the spinal cord.
What does the Peripheral Nervous System consist of?
The connections for communication from the spinal cord throughout the body.
What is the Golgi Tendon Reflex & what does it do?
A sensory receptor located where the muscle and tendon are joined.
It detects tension & signals the muscle to relax when tension increases
Name the types of muscle contractions. Hint there are 2, but 2 sub types under one of them.
- Isometric Contraction
- Isotonic Contraction
2a. Concentric Contraction 2b. Eccentric Contraction
What is Isometric Contraction?
Muscle engages without changing length Eg. Hand gripping something or holding a pose
What is Isotonic Contraction?
Muscle contrtacts and length changes
Eg. lifting a bag up at steady speed or moving into a pose
What is Isotonic Concentric Contraction?
When the muscle contracts to meet resistance while shortening.
ie. bicep curl
What is Isotonic Eccentric Contraction?
Muscle contracts whilst lengthening
ie. Putting shopping down
What is the difference between Isotonic and Isometric Contractions?
Whether or not the muscle changes length.
How are muscle contractions used in Yogasana?
When we hold poses = Isometric Contraction
Chataranga Dandasana and back = Isotonic Contractions
What are the 4 different methods of stretching in Yogasana? Hint: there are 4.
Ballistic
Passive
Active
Facilitated
What is Ballistic Stretching?
Bouncing motion, not recommended in Yogasana.
Jumping through in Surya Namaskar
Bouncing knees in Baddha Konasana
What is Passive Stretching?
static stretching that uses body weight, gravity, and synergist/antagonist pairs to stretch Eg. Vasisthasana/Side Plank
What is Active Stretching?
Being in a position only using muscular contraction of agonist muscles. Eg. Utthita Hasta Padangusthasana- Big Toe Pose
What is Facilitated Stretching?
Also known at PNF (Proprioceptive Neuromuscular Facilitation). Briefly contracting a muscle, signals the Golgi Tendon Organ to signal the spinal cord to advise the muscle to relax allowing it to stretch further once relaxed
So “Contract - Relax”
Eg. Consciously contracting the hamstrings in Janu Sirsasana
What is Abduction? an example and what is being Abducted.
Moving a body part away from the midline. Prasarita Padottanasana (Wide Legged Forward Fold) both thighs are being abducted at the hip joint.
What is Adduction and give one pose example, along with what is being Adducted.
Moving the body towards the midline.
Garudasana/Eagle the thigh at the hip joint and also the arms towards the midline of body
Define Axial Rotation and give one pose example, along with what is being Axially Rotated.
Rotation of the vertebral column around the horizontal axis. Occurs during spinal twists i.e. Ardha Matsyendrasana.