Brain Anatomy: Tectum and Tegmentum Functions

What is the outermost meninx called?

Dura mater

What is the space beneath the arachnoid membrane called?

Subarachnoid space

What are the four large internal chambers of the brain called?

Cerebral ventricles

What is the innermost meninx adhering to the surface of the CNS?

Pia mater Signup and view all the answers

What is the colorless liquid that surrounds and protects the brain and spinal cord?

Cerebrospinal fluid Signup and view all the answers

Which network of capillaries produces cerebrospinal fluid?

Choroid plexuses Signup and view all the answers

What is myelin?

Myelin is a white, fatty substance that surrounds some of the axons of the nervous system. Signup and view all the answers

What are Nodes of Ranvier?

Nodes of Ranvier are small gaps in the myelin coating along the axon. Signup and view all the answers

What are Terminal buttons?

Terminal buttons are small knobs found at the ends of the branches of an axon. Signup and view all the answers

What is the role of Oligodendrocytes?

Oligodendrocytes are glial cells with extensions that wrap around the axons of some neurons in the central nervous system. Signup and view all the answers

How do Schwann cells contribute to the nervous system?

Schwann cells guide axonal regeneration (regrowth) after injury. Signup and view all the answers

What is the function of Astrocytes?

Astrocytes are the largest glial cells that have star-shaped extensions. Signup and view all the answers

What is the function of the inferior colliculi?

Auditory function Signup and view all the answers

What is the function of the superior colliculi?

Visual function Signup and view all the answers

What is the tectum sometimes referred to as in lower vertebrates?

Optic tectum Signup and view all the answers

What are the three structures of particular interest to biopsychologists in the tegmentum?

Periaqueductal gray, substantia nigra, red nucleus Signup and view all the answers

What is the role of the periaqueductal gray?

Mediating analgesic effects of opiate drugs Signup and view all the answers

What are the two structures that compose the diencephalon?

Thalamus, hypothalamus Signup and view all the answers