Category: Muscles

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Structure.

• Origin: pubis.
• Insertion: coccyx, urethra, anal canal, perineal body of the perineum, anococcygeal ligament.

Function.

• Concentric action: supports & maintains position of pelvic viscera; attenuates/resists increase in intra-abdominal pressure in forced exhalation coughing vomiting, urination, and defecation; constricts anus, urethra, and vagina.
• Reverse mover action:
• Eccentric action:
• Isometric action:
• Innervation: sacral spinal nerves S2-S4.
• Arterial supply: inferior gluteal artery.

Clinical Significance.

More.

• https://www.imaios.com/en/e-Anatomy/Anatomical-Parts/Pubococcygeus
• https://youtu.be/B1Y9zZsbhx4
• https://youtu.be/6lx-udPH1vM

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Iliococcygeus.

Structure.

• Origin: ischial spine.
• Insertion: coccyx.

Function.

• Concentric action: supports & maintains position of pelvic viscera; attenuates/resists increase in intra-abdominal pressure in forced exhalation coughing vomiting, urination, and defecation; constricts anus, urethra, and vagina.
• Reverse mover action:
• Eccentric action:
• Isometric action:
• Innervation: sacral spinal nerves S2-S4.
• Arterial supply: inferior gluteal artery.

Clinical Significance.

More.

• https://vimeo.com/208129248
• https://youtu.be/D4Mrytn9Cw0

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: manubrium.

• Insertion: thyroid cartilage of larynx.

Function.

• Concentric action: depress thyroid cartilage of larynx.

• Eccentric action:

• Isometric action:

• Innervation: branches of spinal nerves C1-C3.

• Aterial supply: superior thyroid artery.

Clinical Significance.

More.

• https://www.anatomynext.com/sternothyroid/
• https://www.youtube.com/watch?v=ZJRjqZ1smlo

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: greater horn and body of hyoid.

• Insertion: side of tongue.

Function.

• Concentric action: depress tongue.

• Eccentric action:

• Isometric action:

• Innervation: hypoglossal XII nerve.

• Arterial supply: lingual artery.

Clinical Significance.

 

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: anterior surface of soft palate.

• Insertion: side of tongue.

Function.

• Concentric action: elevates posterior portion of tongue and moves soft palate down on tongue.

• Eccentric action:

• Isometric action:

• Innervation: pharyngeal plexus (vagus X and accessory XI nerves).

• Arterial supply: Lingual artery.

Clinical Significance.

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: styloid process of temporal bone.

• Insertion: side and undersurface of tongue.

Function.

• Concentric action: elevates and retracts tongue.

• Eccentric action:

• Isometric action:

• Innervation: hypoglossal XII nerve.

• Arterial supply: sublingual branch of the lingual artery.

Clinical Significance.

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: mandible.

• Insertion: underneath surface of tongue; hyoid bone.

Function.

• Concentric action: depress tongue; thrusts tongue anteriorly (protraction).

• Eccentric action:      

• Isometric action:

• Innervation: hypoglossal XII nerve.

• Arterial supply: Lingual artery.

Clinical Significance.

 

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Buccinator.

Structure.

• Origin: alveolar process of maxilla and mandible; pterygomandibular raphe.
• Insertion: orbicularis oris.
• Deep to masseter and orbicularis oris.

Function.

• Concentric action: press cheeks against teeth and lips (whistling, glowing, sucking); draws corners of mouth laterally; aids chewing.
• Eccentric action:
• Isometric action:
• Innervation: facial VII nerve.
• Arterial supply: maxillary and facial arteries.
• “Buccinator the whistling sucking chew-inator”.

Clinical Significance.

More.

• http://anatomyzone.com/tutorials/musculoskeletal/muscles-of-facial-expression/
• https://www.anatomynext.com/buccinator/

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more. 

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Inferior oblique.

 

Structure.

• Origin: maxilla in orbital floor.
• Insertion: between inferior and lateral recti.

Function.

• Concentric action: moves eyeball superiorly; lateral rotation. Extorsion.
• Reverse mover action:
• Eccentric action:
• Isometric action:
• Innervation: oculomotor III nerve.
• Arterial supply: branches off the opthalmic artery.

Clinical Significance.

More.

• https://www.anatomynext.com/inferior-oblique/
• https://apps.medsch.ucla.edu/medyear1/Anatomy/extraocularMuscles/InferiorOblique.htm
• https://www.youtube.com/watch?v=bdTYiUGpxKU

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

Download these notes.

Anatomy & Physiology: Muscles—Superior oblique.

 

Structure.

• Origin: sphenoid, superior and medial to the tendinous ring in orbit.
• Insertion: between superior and lateral recti; tendons that pass through the trochlea.

Function.

• Concentric action: moves eyeball inferiorly; medial rotation.
• Reverse mover action:
• Eccentric action:
• Isometric action:
• Innervation: trochlear IV nerve.
• Arterial supply: branches off the opthalmic artery.

Clinical Significance.

More.

• https://www.anatomynext.com/superior-oblique/
• https://apps.medsch.ucla.edu/medyear1/Anatomy/extraocularMuscles/SuperiorOblique.htm

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.