ANATOMY 101: Intermuscular Septum
An #intermuscular #septum is an #aponeurotic#sheath that divides muscle groups from each other thereby creating #compartments in the limbs. It is continuous with the aponeurotic fascia that wraps the outside of the entire limb and dives deep to connect with the bone. Functionally, intermuscular septa group muscles together and enhance their#force #transmission. Conversely, because of direct muscular connections to the septa, a hyper- or hypo-toned muscle could inadvertently have negative effects by restricting movement, strength, or stability.
We find intermuscular septa in both the upper and lower extremities. In the upper #arm, the #medialand #lateral intermuscular septa divide the flexors (biceps et.al.) from the extensor muscles (triceps). In the #thigh, the lateral intermuscular septum divides the #hamstring muscles from the #quadriceps and the medial intermuscular septum divides the quadriceps from the #adductors. Additionally, there is a less evident septum between the adductor muscles and the hamstring muscles. Together, three#muscular #compartments of the thigh are formed: anterior, medial and posterior.
In this image, what look like two "wings" are the aponeurotic fascia which has been separated from where it wrapped the entire limb. The bottom of the central "Y" image is where the septum dives down in between the muscles all the way to the bone, forming the intermuscular septum and divinding the muscles into separate compartments.
Photo Credit: ©
FasciaResearchSociety.org/
