What is neuromuscular activation?
Neuromuscular activation describes a condition in which you are unable to properly activate the necessary muscles to perform a specific action. In this case, your individual muscles may be strong; however, you cannot recruit them when you need them and they become ineffective. For example, after surgery, we frequently see decreased neuromuscular control/activation. This is why dynamic balance training becomes such a large focus of any rehabilitation program as well as strength. Proper activation can improve posture, function, and prevent future injury.
What is the difference between epidural and subdural hematomas?
There are 3 meninges within the brain which are protective layers: the dura mater, arachnoid mater, and the pia mater. These meninges also have corresponding spaces: epidural, subdural, and subarachnoid. Hematomas are collections of blood which occur due to injury, such as hitting your head on the ground. An epidural hematoma refers to bleeding within the space between your skull and the dura mater. These typically present very quickly (in about 15 minutes) and the patient will have decreases in cognition, memory, and potentially consciousness. Patients with subdural hematomas have similar symptoms, but they typically take about 24 hours to develop. They are a much slower bleed which occurs between the dura mater and the arachnoid mater. Both are extremely dangerous if not immediately referred to the emergency room to release the pressure being put on the brain tissue by the collection of blood.
How do you interpret a multivariable regression equation?
A regression equation can be written as the following: y = a + bx1 + bx2. Each "b" represents a value due to a particular characteristic (for example: age and gender). "a" represents the intercept, or the starting value of a participant. This starting value would then increase by "b" for every year increase in age. Therefore, if we are trying to predict height of a child, we would expect every individual to start out around 20 inches long ("a") at birth. Then, for every year you get older (x1), we would expect you to grow "b" inches, while holding gender constant.