PSY 100 Lecture Notes - Lecture 2: Spinal Nerve, Spinal Cord, Endocrine System

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Motor neurons - transmit information from brain (or spinal cord) to muscles. Sensory neurons - transmit information from sensory organs to the brain. Interneurons - communicate internally and transmit information between sensory and transmit information between sensory and motor neurons. Stimulation from other neurons open up channels to let in sodium ions (na+) If inside charge reaches threshold (-60 mv), channels open wide and. Na+ rushes in, changing internal charge to +40 mv. Ex: you cannot dilate your eyes on your own. Sympathetic - nerves that come off spinal = heartbeat, circulation. Things that get you prepared for whatever hands. Relays information between lower and higher brain centers. Is actually part of the four brain, not the hindbrain. Is often referred to as the sensory relay station. Diffuse collection of neurons involved in arousal and stereotyped patterns, such as walking. A form of amnesia, will not be able to create/remember new things. Controls the 4 f"s: feeding, fleeting, fighting, matting.

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