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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
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Is the adductor longus parallel or pennate?
parallel
What is the definition of a pennate muscle?
pennate is the opposite of parallel (fusiform) parallel muscle eg biceps brachii has fibres which run parallel, whereas pennate fibres run diagonally to the axis of movement, unipennate, bipennate and multipennate refers to the number of tendonous attachments unipennate muscle fibers which converge on one side of a tendon ca be found in the gluteus maximus, bipennate fibers converge in a featherlike way towards a central tendon, and multipennate converge on more tendons such as deltoid which has three heads.
Describe fascicle arrangement in a pennate muscle?
The fascicles are short and attach obliquely to a central tendon that runs the length of a muscle.
What and the difference between a pennate and a centric diatom?
one lives in salt water and the other in fresh water.
What's the difference between a pennate and a centric diatom?
one lives in salt water and the other in fresh water.
Is the infraspinatus a pennate fiber arrangement?
yes
What kind of pennate muscle is the vastus intermedius?
Strap
Which diatoms can move around the best?
pennate diatoms
Is the adductor magnus a parallel or pennate muscle?
parallel
What is a pennate muscle?
Pennate MusclesIn a pennate muscle, the fascicles form a common angle with the tendon. Because the muscle cells pull at an angle, contracting pennate muscles do not move their tendons as far as parallel muscles do. But a pennate muscle contains more muscle fibers--and, as a result, produces more tension--than does a parallel muscle of the same size. (Tension production is proportional to the number of contracting sarcomeres; the more muscle fibers, the more myofibrils and sarcomeres.)
What are the pennate muscles of the human body?
deltoid gastrocnemius rectus femorus
A muscle in which the fibers are arranged at an angle to a central longitudinal tendon has a arrangement?
Pennate.
