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The brain is a dense organ with various functional units. Understanding the anatomy of the brain can be aided by looking at it from different organizational layers. In this lesson, we’ll discuss the principle brain regions, layers of the brain, and lobes of the brain, as well as common terms used to orient neuroanatomical discussions. 2.
BRAIN ANATOMY. Adapted from Human Anatomy & Physiology by Marieb and Hoehn (9th ed.) The anatomy of the brain is often discussed in terms of either the embryonic scheme or the medical scheme. The embryonic scheme focuses on developmental pathways and names regions based on embryonic origins.
This module will offer a basic guide to the structure of the brain and nervous system, starting from a description of neurons and working up to a description of how these are organized into different anatomical systems. In Part 1, we’ll look at the neuron and how neurons communicate with each other.
The peripheral nervous system (PNS) is composed of spinal nerves that branch from the spinal cord and cranial nerves that branch from the brain. The PNS includes the autonomic nervous system, which controls vital functions such as breathing, digestion, heart rate, and secretion of hormones.
Anatomy of the Brain. The brain consists of the brain stemand the cerebral hemispheres. The brain stem is divided into hind-brain, mid-brain and a ‘between-brain’ called the diencephalon. The hind-brain is an extension of the spinal cord. It contains networks of neurons that constitute centres for the control of vital
The initial sequence of brain configuration is largely programmed by one’s genetic makeup when in the womb. Soon after conception, the brain begins as a primordial tube-like structure that develops rather quickly into three distinct parts: hindbrain, midbrain, and forebrain. Also referred to as the brain stem region, the hindbrain
Four main brain functions are also dis-cussed, including mobility, communication, biologic maintenance, and survival. Authored by Pierre Rabischong, this section includes fascinating discussions of the inte-grated nervous system, providing a conceptual global framework of brain function.
