Describe the differences between a fusiform and pennate muscle?

Answer 1

In non pennate or fusiform structure, fibers run in line with the line of pull. There is a longer fiber length associated with a fusiform structure, but often not a very thick cross-section

-Weaker overall, but greater ROM (range of movement) making it good for speed

In a pennate or penniform muscle structure, there is an oblique fiber pattern. Fibers do not pull in the same direction as the line of muscle pull. There is a shorter fiber length but usually a thicker cross sectional area.

-There are three pennate types

1) Unipennate: One-sided feather such as in the semimembranous

2) Bipennate: Two-sided feather such as in the gastrocnemius

3) Multipennate: many-headed two sided feather such as in the deltoids

-Good for strength, smaller ROM, meaning it is not as great for speed