 WOlA&feature=player_detailpage WOlA&feature=player_detailpage  OEQ4&feature=plcp OEQ4&feature=plcp

 Scalp  Skull  Meninges 1. Dura mater = outermost layer 2. Arachnoid mater = middle layer Subarachnoid space = space between arachnoid and pia mater > contains cerebrospinal fluid * Spinal tap 3. Pia mater = thinnest layer

Dura mater Contains tough fibrous connective tissue with many blood vessels Arachnoid Thin, netlike layer with blood bessels that reabsorb cerebrospinal fluid Pia Mater Very thin layer with many blood vessels

 Cerebrum  Diencephalon  Brain Stem  Cerebellum

CEREBRUM

 Right & Left hemispheres connected by corpus callosum (bridge of fibers)  Surface = ridges (gyri) & grooves (sulci)  Center for reasoning & memory  Largely determines a person’s intelligence and personality  Composed of 4 lobes: 1. Frontal 2. Parietal 3. Temporal 4. Occipital

DIENCEPHALON

 Thalamus  Integrates sensory impulses (except smell)  Sends motor signals toward spinal cord  Maintains consciousness  Hypothalamus  Produce hormones that control the pituitary  Hunger  Body Temperature  Works with limbic system to control emotions

CEREBELLUM

 Coordinating Center for motor activity Balance Posture Walking

BRAIN STEM

Midbrain Controls head and eyes in response to visual stimuli Controls head and trunk in response to auditory stimuli Pons Relay center between cerebrum and medulla Relay center between cerebellum and cerebrum Medulla oblongata Receives info from spinal cord Regulates heart rate, blood pressure, breathing Coughing, sneezing and vomiting

There are 4:  2 lateral / right & left (in cerebrum)  Third ventricle (near corpus callosum)  Fourth ventricle (in brain stem) Cavities that fill with cerebrospinal fluid (nutrition & gas exchange for neurons)