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The Nervous System
The Nervous System

... • Synapse: a specialized structure that forms a junction between two neurons or between a neuron and another type of cell (See textbook Figure 1-4.) ...
PAX: A mixed hardware/software simulation platform for
PAX: A mixed hardware/software simulation platform for

... (action potentials) by computing the currents flowing through cell membrane and synaptic nodes. It is possible to reduce the size of these models to facilitate their computation. Other popular models are based on a phenomenological description of the neurons. They are well adapted to the study of co ...
the structure of the nervous system
the structure of the nervous system

... • Initial segment- point of cell body emergence to point of myelin initiation • Axon Hillock- the conical area of origin of the axon from the nerve cell body • Telodendria- structures at the terminal branches of axon that contain neurotransmitters • Synaptic terminal- a bulb at the end of the axon i ...
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Na+ - cloudfront.net

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General Senses Complete
General Senses Complete

... Exteroceptors: classification of sensory receptors React to stimuli in the external environment Usually found close to the body surface Example: receptors in the skin, vision apparatus of the eye, receptors in the ear Interoceptors (visceroceptors): respond to stimuli within the body Are found in th ...
Jay_21Mar2013
Jay_21Mar2013

... I. Distinguish 3-D structure from connectivity II. Keep in mind that not all structures have (known) functions – biological structures are evolved, not designed. III. Mind your Greek/Latin ...
the autonomic nervous system
the autonomic nervous system

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Answers to Mastering Concepts Questions
Answers to Mastering Concepts Questions

... 15. What is the role of transduction in the sensory system? How does transduction occur for each of the senses described in this chapter? Transduction is the process where the energy of external stimuli is converted to the energy of action potentials, the form of energy the nervous system is able to ...
The Nervous System
The Nervous System

... nervous system. • Neurons are specialized to transmit information throughout the body. • They are responsible for communicating information in both chemical and electrical forms. There are also several different types of neurons responsible for different tasks in the human body. 1. Sensory neurons ( ...
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... • membrane potential = electrical voltage difference measured across the membrane of a cell • resting membrane potential = membrane potential of a neuron measured when it is unstimulated – results from the build-up of negative ions in the cytosol along the inside of the neuron’s PM – the outside of ...
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Chapter 48 Nervous Systems

...  Near its end, axons divide into several branches, each of which ends in a synaptic terminal.  The site of communication between a synaptic terminal and another cell is called a synapse.  At most synapses, information is passed from the transmitting neuron (the presynaptic cell) to the receiving ...
Chapter 2: The Brain and Behavior
Chapter 2: The Brain and Behavior

... the corpus callosum is cut, a “split brain” results. Then visual information can be sent to just one hemisphere by flashing it in the right or left visual field as the person stares straight ahead. ...
Chapter 9-中樞神經系統檔案
Chapter 9-中樞神經系統檔案

... Figure 9.4 Blood-brain barrier. (a) Typical capillaries (found in most regions of the body). Whereas exchange of small hydrophilic molecules occurs by simple diffusion between blood and interstitial fluid through pores, proteins are too large to cross through pores; some proteins are transported acr ...
Chapter 9-中樞神經系統檔案
Chapter 9-中樞神經系統檔案

... Figure 9.4 Blood-brain barrier. (a) Typical capillaries (found in most regions of the body). Whereas exchange of small hydrophilic molecules occurs by simple diffusion between blood and interstitial fluid through pores, proteins are too large to cross through pores; some proteins are transported acr ...
Nervous System - Intermediate School Biology
Nervous System - Intermediate School Biology

... Explain that messages are carried through these systems by nerve cells or neurons. Describe the structure of a neuron Describe the functions of the parts of a neuron: Dendrite(s) The axon The cell body Describe the three types of neurones: Sensory neurons, Motor neurons, Interneurons Know that the c ...
HECTtype E3 ubiquitin ligases in nerve cell development and
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... Based on their mode of action, two families of E3 ligases are distinguished, i.e. the Really Interesting New Gene (RING) and the Homologous to E6-AP C-terminus (HECT) type. Whereas RING type enzymes bring the ubiquitin-E2 complex into the molecular vicinity of the substrate and facilitate ubiquitin ...
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Motor Neuron - papbiobellaire

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Chapter 6: Summary and Discussion

... could determine the source of the V1 selection signals in brain regions that store the associations between visual stimuli and rewards. The delivery of reward steers learning and this is the topic of the next two chapters. In chapter 4 we investigated object-based learning in area FEF by using a rea ...
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... Inattentional blindness refers to the inability to see an object or a person in our midst. Simons & Chabris (1999) showed that half of the observers failed to see the gorilla-suited assistant in a ball passing game. ...
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... The neurons only open their bells-how-smells-can-trigger-emotionssignal channel when they and-memories/ receive stimulation from the ...
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14/15 April 2008

... How many memories can be stored in the network? To store M memories, each of length N bits, in a network of N neurons, we first ask how many stable patterns can be reached? In 1987, McEliece et al derived an upper limit for the number of memories that can be stored accurately: M = N/(2 logN). e.g. f ...
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CNS

... – Norepinephrine • Locus coeruleus is the origin of cell bodies that secrete norepinephrine to most of the CNS. • Activated strongly when new sensory stimuli are encountered • Regulate vigiliance & attentiveness, inactive during sleep • Overactivity = axiety • Underactivity = depression ...
An octopaminergic system in the CNS of the snails, Lymnaea
An octopaminergic system in the CNS of the snails, Lymnaea

... and morphological criteria. After double labelling (intracellular staining with Lucifer yellow followed by octopamine-immunocytochemistry) these neurons were shown to be octopamine immunoreactive and called OC (Octopamine Containing) neurons. Synchronous intracellular recordings demonstrated that th ...
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Activity-dependent plasticity

A defining feature of the brain is its capacity to undergo changes based on activity-dependent functions, also called activity-dependent plasticity. Its ability to remodel itself forms the basis of the brain’s capacity to retain memories, improve motor function, and enhance comprehension and speech amongst other things. It is this trait to retain and form memories that is functionally linked to plasticity and therefore many of the functions individuals perform on a daily basis. This plasticity is the result of changed gene expression that occurs because of organized cellular mechanisms.The brain’s ability to adapt toward active functions has allowed humans to specialize in specific processes based on relative use and activity. For example, a right-handed person may perform any movement poorly with his/her left hand but continuous practice with the less dominant hand can make both hands just as able. Another example is if someone was born with a neurological disorder such as autism or had a stroke that resulted in a disorder, then they are capable of retrieving much of their lost function by practicing and “rewiring” the brain in order to incorporate these lost manners. Thanks to the pioneers within this field, many of these advances have become available to most people and many more will continue to arrive as new features of plasticity are discovered.
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