The extensor digitorum muscle is the one in the hand..so it is not either brevis or longus.tclme elmo wrote:
That one's not the best, but I don't know what to tell you.
I have just discovered that there is apparently: the extensor digitorum (hand), the extensor digitorum brevis (foot), and the extensor digitorum longus (foot).
I just want clarification that the one we need to learn is the one in the hand?
Also, is there such thing as origin, insertion, and function for the Thoracolumbar Fascia? I have that it:
-covers deep muscles of back
-attaches medially to spines of vertebrae - inferiorly to ilium (pelvic bone)
-Provides for muscle attachments
But that's not necessarily origin, insertion, and function.
As far as I understand it, thoracolumbular fascia is dense connective tissue to which the latissimus dorsi muscle is joined. Its function is in load transfer from spine to legs. I wasn't able to find an origin and insertion though.
This is what wikipedia says:
Thoracolumbular fascia: It is made up of three layers, anterior, middle, and posterior. The anterior layer is the thinnest and the posterior layer is the thickest. Two spaces are formed between these three layers of the fascia. Between the anterior and middle layer lies the quadratus lumborum muscle. The erector spinae muscle is enclosed between the middle and posterior layers.
Above, it passes in front of the Serratus posterior superior and is continuous with a similar investing layer on the back of the neck—the nuchal fascia.
In the thoracic region the lumbodorsal fascia is a thin fibrous lamina which serves to bind down the Extensor muscles of the vertebral column and to separate them from the muscles connecting the vertebral column to the upper extremity.
It contains both longitudinal and transverse fibers, and is attached, medially, to the spinous processes of the thoracic vertebræ; laterally to the angles of the ribs.
