lecture notes 3 - Where in the brain is Psychology • The...

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Unformatted text preview: Where in the brain is Psychology? • The neuraxis is an imaginary line drawn through the spinal cord up to the front of the brain • Anatomical directions are understood relative to the neuraxis • Anterior (rostral): toward the head • Posterior (caudal): toward the tail • Ventral (inferior): toward the belly • Dorsal (superior): toward the back (top of head) • Location in brain: – Ipsilateral: same side of brain – Contralateral: opposite Neuroanatomy Terms Layout of the Nervous System • Vertebrate nervous system consists of – The central nervous system (CNS) – The peripheral nervous system (PNS) • The CNS: brain and spinal cord • The PNS: everything else – PNS has two parts • The somatic nervous system • The autonomic nervous system (ANS) Types of nerves • Efferent nerves: – Carry nerve impulses AWAY FROM the nervous system • Afferent nerves: – Carry nerve impulses TO the nervous system ANS • Consists of two kinds of efferents – Sympathetic • Stimulate, organize, and mobilize energy resources • Changes are indicative of psychological arousal – Parasympathetic • Act to conserve energy resources • Changes are indicative of psychological relaxation – Each organ receives opposing sympathetic and parasympathetic activity Overview of the CNS Myelencephalon • The myelencephalon consists of the – Medulla oblongata – The nuclei of the medulla control vital functions such as regulation of the cardiovascular system, breathing, and skeletal muscle tone Metencephalon • Metencephalon consists of the – Pons • Contains the core of the reticular formation • The pons is involved in the control of sleep and arousal – Cerebellum – involved in motor control Mesencephalon • The mesencephalon (midbrain) consists of – Tectum is the dorsal portion of midbrain • Superior and inferior colliculi are involved in the visual and auditory systems – Tegmentum is the portion of the midbrain located under the tectum Diencephalon • Diencephalon consists of – Thalamus: contains nuclei that receive sensory information...
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This note was uploaded on 04/16/2008 for the course PSYCH 220 taught by Professor Shervin during the Spring '08 term at Western Washington.

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lecture notes 3 - Where in the brain is Psychology • The...

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