Daniel Ou-Yang's research group at Lehigh University is the first to use a laser tool known as optical tweezers to study the interior of an endothelial cell in a non-invasive way without introducing ...

The shape and differentiated state of many cell types are highly sensitive to the rigidity of the microenvironment. The physical mechanisms involved, however, are unknown. Here, we present a ...

Muscle rigidity refers to stiffness or tension in your muscles. This tends to happen when muscles contract for a long period of time, often due to stress. But certain medications and underlying ...

Parkinson’s disease is a disorder of the central nervous system that gets worse over time with no cure. Because it targets the nervous system, it impairs movement. ‌Rigidity is one of the leading ...

Nuchal rigidity refers to neck stiffness caused by serious medical conditions such as bacterial meningitis. You probably don’t give your neck the credit it deserves. It’s easy to take for granted that ...

Abdominal rigidity is stiffness of your stomach muscles that worsens when you touch, or someone else touches, your abdomen. It’s an involuntary response to prevent pain caused by pressure on your ...

Figure 1. Cognitive Rigidity is one element in a challegning suite of traits and behaviors. For details, see text. Figure (c) James Coplan, MD, used by permission.B Source: James Coplan, MD When I was ...