The dissections showed that the fascia lata (FL) attaches to the entire extent of the inferior aspect of the iliac crest. In the upper and lateral thigh, the FL receives fibrous contributions from the gluteus maximus and tensor fascia lata (TFL) to form the ITB.
Tunica media. This is the middle layer. It is made of smooth muscle and elastic fibers. It is responsible for vasodialation and vasoconstriction of the blood vessels. It is also the target tissue for Vasopressin (ADH) Hormone and plays into blood pressure. Tunica adventitia This is the most superficial of the layers.
This happens when one or more of the blood vessels in the hand or wrist become blocked. There are many diseases of blood vessels that can cause vasoconstriction and vaso-occlusion. One of the most common is Raynaud's Disease, during which there is an abnormal reaction in the hand when it is exposed to cold.