Types of Muscle Contractions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Contraction is | when tension is developed in a muscle as result of a stim
Used to:
Cause
Control
Prevent
Accelerate mvmnt
Deccelerate mvmnt
🗑
|
||||
| Types of Muscle Contraction | Isometric
Isotonic
🗑
|
||||
| Isometric ContrXn | Tension is developed, but angle doesn't change
Static contraction
significant amnt of T may be developed to maintain joint angle
Prevents mvmnt by external F
🗑
|
||||
| Isotonic ContrXn | Tension is developed, angle changes
Dynamic contractions
Varying degrees of T in muscles result in joint angles changing
Cause or control joint mvmnt
🗑
|
||||
| Concentric | type of isotonic contraction
Muscle develops tension as it shortens
Muscle developes enough F to overcome Resistance
Against gravity
Positive
🗑
|
||||
| Eccentric | Muscle gradually lessens T to control descent of resistance
Muscle lengthens under T
Resistance overcome muscle contraction but muscle can still control
Mvmnt with gravity
F of muscle < R
Negative
Decelerates body mvmnt
🗑
|
||||
| Isokinetics | Exercise using Concentric and/or Eccentric contractions
V of mvmnt is constant
Contraction occurs throughout the mvmnt
NOT another type of contraction
Ex- Biodex, Cybex, Lido
🗑
|
||||
| Agonist Muscles | Primary moves
Cause joint motion thru specified plane when contracting concentrically
🗑
|
||||
| Assistant movers or Assisters | Agonist muscles that contribute sig. less to the joint motion
🗑
|
||||
| Antagonist | located on opp side of joint from agonist
Opposite concentric contraction
"Contralateral muscles"
Work in coop w/ agonist by relaxing and allowing mvmnt
Concentric contraction performs opposite joint motion of agonist
🗑
|
||||
| Synergist | Assist agonists
"Guiding Muscles"
Refine mvmnt & Rule out undesired motion
🗑
|
||||
| Neutralizers | Prevent undesirable movements like inappropriate muscle substitutions
Contract to resist specific actions of other muscles.
Ex- when only sup. of biceps brachii is desired, triceps brachii contracts to neutralize flexion action of the biceps brachii
🗑
|
||||
| Stablizers | Surround joint
contract to fixate or stabilize area to enable another limb to move
known as FIXATORS
estab. firm base for more distal joints to work
Ex: muscles of scap and gleno contract to stabilize shoulder and humerus in bicep curl
🗑
|
||||
| Force Couples | Two or more F are pulling in diff. directions on an object causing the object to rotate about its axis.
More efficient movement
Steering wheel
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
jmgibson1
Popular Science sets