In anatomy, internal rotation (also known as medial rotation) is rotation towards the center of the body.
The muscles of internal rotation include:
- of arm/humerus at shoulder
- Deltoid muscle
- Subscapularis
- Teres major
- Latissimus dorsi
- Pectoralis major
- of thigh/femur at hip
- Tensor fasciae latae
- Gluteus medius
- Gluteus minimus
- of leg at knee
- Popliteus
- Semimembranosus
- Semitendinosus
- of eyeball (motion is also called "intorsion" or incyclotorsion)
- Superior rectus muscle
- Superior oblique muscle
Famous quotes containing the words internal and/or rotation:
“The analogy between the mind and a computer fails for many reasons. The brain is constructed by principles that assure diversity and degeneracy. Unlike a computer, it has no replicative memory. It is historical and value driven. It forms categories by internal criteria and by constraints acting at many scales, not by means of a syntactically constructed program. The world with which the brain interacts is not unequivocally made up of classical categories.”
—Gerald M. Edelman (b. 1928)
“The lazy manage to keep up with the earth’s rotation just as well as the industrious.”
—Mason Cooley (b. 1927)