Scattered throughout skeletal muscle, the muscle spindles are composed of connective tissue capsules containing bundles of specialized muscle fibers called intrafusal fibers. Wrapped around the middle ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

In a serendipitous discovery, UC San Diego researchers using cryo-EM technology captured the first visualizations of the 3-D structure of the muscle acetylcholine receptor in fetal and adult muscles.

Proprioception, otherwise known as kinesthesia, is your body’s ability to sense movement, action, and location. It’s present in every muscle movement you have. Without proprioception, you wouldn’t be ...

Have you ever stumbled on uneven ground (or even ground) but somehow caught yourself before you fell? That’s proprioception, your body’s built-in GPS. It’s your body’s ability to sense where it is in ...

Doctors identify these movements as 'fasciculations', because they occur when individual nerve fibers, which control small muscle groups activate independently to produce brief muscle contractions.

Discover proprioception, your body's hidden sixth sense that guides movement and balance subconsciously. As we age, this crucial ability declines, increasing fall risks and impacting mobility.