What's a Brain? Part 2 - UCSD Cognitive Science

What's a Brain? Part 2 - UCSD Cognitive Science

COGNITIVE SCIENCE 17 Whats A Brain? Part 2

Jaime A. Pineda, Ph.D. Brain Quiz What did the right hemisphere say to the left hemisphere when they could not agree on anything? Lets split

What do you call a group of brains that form a singing group in school? A glia club What do you get when you cross a thought with a light? A bright idea What is the brains favorite television channel? The Neural Network

What do neurons use to talk to each other? Cell-ular phones What did the Hollywood director say after making a movie about myelin? Thats a wrap

Principles of Brain Organization Subdivided into 3 primary and 5 secondary regions Forebrain Telencephalon (endbrain) Diencephalon (interbrain)

Midbrain Mesencephalon Hindbrain Metencephalon

Myelencephalon Neural plate > neural tube Principles (cont.) Brain contains an

interconnected system of ventricles Principles (cont.) Brain contains a protective covering (meninges)

Cerebral Spinal Fluid (CSF) Hydrocephalus

Principles (cont.) Brain is composed of two hemispheres connected by a set of fibers (corpus callosum) 200-250 million fibers

Monotremes and marsupials do not have a corpus callosum Agenesis and split brain patients

Principles (cont.) Cortex is subdivided into four major external lobes (plus the internal limbic lobe)

Limbic lobe Found only in the medial view of the brain. Its major

responsibilities include olfaction and emotions Principles (cont.) Cortex is subdivided into areas of specialized function

Principles (cont.) Some areas of cortex (primarily sensory and motor areas) are topographically

mapped. V1 (retinotopic) A1 (tonotopic) M1 (mototopic) S1 (somatotopic)

Anterior-Posterior Organization Dorsal-Ventral Organization Left-Right Organization

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