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Chap 13 part III

Diencephalon and onward

Diencephalon 1. forms center core of forebrain 2. Three parts: Thalamus, Hypothalamus, and Epithalimus
Coronal Section 1. Formed by thalamus and hypothalamus 2. borders 3rd ventricle 3. made mostly of grey matter
Thalamus 1. GATEWAY TO CEREBRAL CORTEX 2. makes up 80% of diencephalon 3. every part of brain that communicates with cerebral cortex must relay its signal through a nucleus of thalamus 4. has many nuclei that send axons out through the cerebral cortex
Hypothalamus 1. lies below the thalamus 2. dozen nuclei like thalamus 3. in charge of visceral sense (hunger, body temperature, emotions etc. 4. PITUITARY GLAND
Pituitary gland 1. Controls secretion of HORMONES -part of hypothalamus that projects inferiorly from hypothalamus -anterior and posterior parts
Epithalamus 1. most dorsal part of diencephalon 2. contains only ONE nuclei 3. PINEAL GLAND
Pineal Gland 1. part of epithalamus that produce melatonin by influence of hypothalamus 2. helps regulate sleep-wake cycls
Brain Stem 1. produces automatic behavior necessary for survival 2. Passageway for ALL FIBER TRACTS running between cerebrum and spinal cord
Brain Stem 3 parts 1. Midbrain 2. Pons 3. Medulla Oblongata
Midbrain 1. most superior structure of brain stem
Midbrain seven parts 1. Periaqueductal Gray Matter 2. Cerebral Peduncles 3. Superior Cerebellar Peduncles 4. Corpora quadrigemina of tectum 5. Substantia Nigra 6. Red nucleus
Periaqueductal Grey Matter 1. Part of Midbrain of brainstem 2. related to fight/flight reaction
Corpora quadrigeminaof tectum 1. Two parts: Superior Colliculi and Inferior Colliculi
Superior Colliculi part of Corpora quadrigeminaof tectum of midbrain of brainstem that is responsbile for visual reflexes
Inferior Colliculi part of Corpora quadrigeminaof tectum of midbrain of brainstem that are responsible for reflexes to sound
Substantia Nigra degradation of this is linked to Parkinson's disease
Pons 1. under midbrain in brainstem 2. above medulla oblongata 3. Pontine Nucleus 4. Contains nuclei of Cranial Nerves 5-7
Middle cerebellar peduncle -connects pons to cerebellum
Medulla Oblangata -continuous with spinal cord at forament magnum -contains cerebral nerves 8-12
Medulla Oblangata 3 Parts 1. Pyramids of Medulla 2. Reticular Formation 3. Inferior Cerebellar Peduncle
Created by: vs604