These five cost-effectiveness tests are the participant cost test (PCT), the. utility/program administrator cost test (PACT), the ratepayer impact measure test (RIM), the. total resource cost test (TRC), and the societal cost test (SCT).
The brain is composed of 3 main structural divisions: the cerebrum, the brainstem, and the cerebellum (see the images below). At the base of the brain is the brainstem, which extends from the upper cervical spinal cord to the diencephalon of the cerebrum.ross Anatomy: Meninges. The meninges consist of 3 tissue layers that cover the brain and spinal cord: the pia, arachnoid, and the dura mater (see the image below). The pia along with the arachnoid are referred to as the leptomeninges, whereas the dura is referred to as the pachymeninx.
Figure 1: General anatomy of the human brain. Marieb & Hoehn (Human Anatomy and Physiology, 9th ed.) â Figure 12.2. CEREBRUM: Divided into two hemispheres, the cerebrum is the largest region of the human brain â the two hemispheres. together account for ~ 85% of total brain mass. The cerebrum forms the superior part of the brain, covering and. obscuring the diencephalon and brain stem similar to the way a mushroom cap covers the top of its stalk. Elevated ridges of tissue, called gyri (singular: gyrus), separated by shallow groves called sulci (singular: sulcus) mark nearly the entire surface of the cerebral hemispheres.