Muscle with fascicles that attach obliquely to its tendon
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Rectus femoris
Muscles of the iliac and anterior femoral regions. (Rectus femoris highlighted in red.)
Details
Origin
Anterior inferior iliac spine and the exterior surface of the bony ridge which forms the iliac portion of the acetabulum
Insertion
Inserts into the patellar tendon as one of the four quadriceps muscles
Artery
Lateral femoral circumflex artery
Nerve
Femoral nerve
Actions
Knee extension; hip flexion
Antagonist
Hamstring
Identifiers
TA98
A04.0.00.016
TA2
1989
FMA
74993
Anatomical terms of muscle
[edit on Wikidata]
A pennate or pinnate muscle (also called a penniform muscle) is a type of skeletal muscle with fascicles that attach obliquely (in a slanting position) to its tendon. This type of muscle generally allows higher force production but a smaller range of motion.[1][2]
When a muscle contracts and shortens, the pennation angle increases.[3]
^Frederick H. Martini, Fundamentals Of Anatomy And Physiology Archived 2006-11-14 at the Wayback Machine.
^"Jacob Wilson, Abcbodybuilding, The Journal of HYPERplasia Research". Archived from the original on 2008-12-05. Retrieved 2006-12-01.
^Maganaris, Constantinos N; Baltzopoulos, Vasilios; Sargeant, Anthony J (15 October 1998). "In vivo measurements of the triceps surae complex architecture in man: implications for muscle function". The Journal of Physiology. 512 (Pt 2): 603–614. doi:10.1111/j.1469-7793.1998.603be.x. PMC 2231202. PMID 9763648.
A pennate or pinnate muscle (also called a penniform muscle) is a type of skeletal muscle with fascicles that attach obliquely (in a slanting position)...
different muscle architecture types including: parallel, pennate and hydrostats. Force production and gearing vary depending on the different muscle parameters...
The extensor digitorum longus is a pennatemuscle, situated at the lateral part of the front of the leg. It arises from the lateral condyle of the tibia;...
gastrocnemius muscle. The soleus is a complex, multi-pennatemuscle in humans, usually having a separate (posterior) aponeurosis from the gastrocnemius muscle. Most...
ratio (AGR) is a feature of pennatemuscle defined by the ratio between the longitudinal strain of the muscle and muscle fiber strain. It is sometimes...
the muscle, the change in length is smaller, but this same orientation allows for more fibers (thus more force) in a muscle of a given size. Pennate muscles...
runs from a muscle's origin to its insertion. The usual arrangements are types of parallel, and types of pennatemuscle. In parallel muscles, the fascicles...
demands of the contraction. When a pennatemuscle is subjected to a low force, resistance to width changes in the muscle cause it to rotate which consequently...
motion. Muscle fibers can only contract up to 40% of their fully stretched length. [citation needed] Thus the short fibers of pennatemuscles are more...
tissue which runs from the frontalis muscle anteriorly to the occipitalis posteriorly. Pennatemuscles, in which the muscle fibers are oriented at an angle...
demands of the contraction. When a pennatemuscle is subjected to a low force, resistance to width changes in the muscle cause it to rotate which consequently...
allowing the muscle to change length, vice versa, or the muscle may be subject to more complex testing, such as in work loops. When pennatemuscles are used...
perimysium, it was experimentally shown that cutting of the aponeurosis in a pennatemuscle did not prevent tension generation further along towards the tendon...
in the United States census Physiological cross sectional area of a pennatemuscle Primary care service area, geographic areas that are self-sufficient...
architecture of the fiber orientation relative to a muscle's line of action, for example, as found in pennatemuscles. The complexities of the different visco-elastic...
in various organisms and structures, including: Some muscles can be unipinnate or bipinnate muscles The fish Platax pinnatus is known as the pinnate spadefish...
large, pennate extensor tibiae muscle, but the tibia is kept flexed by the simultaneous contraction of the flexor tibiae muscle. The extensor muscle is much...
an algal bloom, consisting predominantly of the domoic acid-producing pennate diatom, Pseudo-nitzschia. Consequently, elevated levels of domoic acid...
blooms after the sea ice retreats and exports significant carbon. The pennate diatom Fragilariopsis kerguelensis, found throughout the Antarctic Circumpolar...
have a combination of circular muscles that constrict the body, making it longer, and an opposing set of longitudinal muscles, that shorten the body; these...
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