Fiber arrangements and muscle shapes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Fiber arrangement affects | 1. Muscle's ability to exert F
2. ROM
🗑
|
||||
| Greater cross section diameter= | Greater F exertion
🗑
|
||||
| Longer muscle= | Greater ROM
🗑
|
||||
| 2 major types of fiber arrangements | 1. Parallel
2. Pennate
🗑
|
||||
| Parallel Muscles | Fibers arranged parallel to length of the muscle
Produce >ROM
🗑
|
||||
| Types of Parallel Muscles | Flat
Fusiform
Strap
Radiate
Sphincter (Circular)
🗑
|
||||
| Flat | Ex- Rectus Abdominus, External Oblique
Thin and broad, originating from sheet like aponeuroses
Forces are spread over a broad muscle
🗑
|
||||
| Fusiform | Ex- Brachialis, Biceps Brachii
Spindle-shaped w/ central belly that taper into tendons on each end
F is focused onto small, bony targets
🗑
|
||||
| Strap | Ex-Sartorius
Uniform in diameter
F is focused onto small bony targets
🗑
|
||||
| Radiate | Ex-Pectoralis Major, Trapezius
Triangular or Fan-Shaped or Convergent
Flat+Fusiform
🗑
|
||||
| Sphincter (Circular) | Ex- Orbicularis Oris
Endless Strap Muscles
Surrounds openings and functions to close them upon contraction
🗑
|
||||
| Pennate Muscles | shorter fibers
arranged obliquely to their tendons
> Cross sectional diameter...> Power
🗑
|
||||
| Types of Pennate Muscles | Unipennate
Bipennate
Multipennate
🗑
|
||||
| Unipennate | Ex- Biceps Femoris, Extensor Digitorum Longus, Tibialis Posterior
Fibers run obliquely from tendon on one side ONLY
🗑
|
||||
| Bipennate | Ex- rectus femoris, flexor hallicus longus
Fibers run obliquely on both sides of a central tendon
🗑
|
||||
| Multipennate | Ex-Deltoid
Several tendons with fibers running diagonally btwn them
🗑
|
||||
| Strongest Contraction produced by | Bipennate and Multipennate
🗑
|
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