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text - Systems Neuroscience Course, MEDS 371, Univ. Conn. Health
text - Systems Neuroscience Course, MEDS 371, Univ. Conn. Health

... These cells project axons to neurons in the lateral hypothalamic area (Fig. 8, red). Lat- FIG. 8. Hypothalamic influence on caloric eral hypothalamic neurons secrete orexins homeostasis. and melanin-concentrating hormone (MCH) via projections terminating in various brain regions. This activity const ...
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Intro to Nervous System

... The process of homeostasis makes sure that the activities that occur in the body are maintained within normal physiological limits. In addition, our body constantly reacts to a multitude of signals, be it external or internal signals. Two body systems are responsible for dealing with these signals a ...
The relationship between the activity of neurons recorded
The relationship between the activity of neurons recorded

... Accurate decoding of the neural activity in the primary motor cortex (M1) could be very useful for brain machine interface applications such as computer displays or prosthetic limbs. In this study we examined information coding in M1 neurons to elucidate the relationship between the activity of M1 n ...
The autonomic nervous system (ANS)
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...  Norepinephrine (NE) ACh is the same neurotransmitter that is found in the somatic motor neurons and is released in the ANS:  All ANS preganglionic axons  All parasympathetic postganglionic axons at synapses with their effectors ACh releasing fibers are called Cholinergic Fibers NE is released by ...
The Nervous System - Northwest ISD Moodle
The Nervous System - Northwest ISD Moodle

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22 reflexes 1 - The reflex arc

... This is what you call a MONOSYNAPTIC arc If there are any interneurons in the way between the afferent and the efferent neurons, this is called a POLYSYNAPTIC arc. There can be anywhere up to 200 synapses in a polysynaptic arc In the childish diagram above, some important elements have been omitted: ...
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Chapter 45 Presentation-Hormones and the Endocrine System

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Nervous System - Seattle Central

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... above. 2. Effect: increased heart rate, blood pressure, and blood sugar. These provide ENERGY for the fight or ...
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... To illustrate competitive learning, consider the Kohonen network with 100 neurons arranged in the form of a two-dimensional lattice with 10 rows and 10 columns. The network is required to classify two-dimensional input vectors  each neuron in the network should respond only to the input vectors oc ...
Psychology 10th Edition David Myers
Psychology 10th Edition David Myers

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Slide 39

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The Nervous System
The Nervous System

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Circumventricular organs

Circumventricular organs (CVOs) are structures in the brain that are characterized by their extensive vasculature and lack of a normal blood brain barrier (BBB). The CVOs allow for the linkage between the central nervous system and peripheral blood flow; additionally they are an integral part of neuroendocrine function. The lack of a blood brain barrier allows the CVOs to act as an alternative route for peptides and hormones in the neural tissue to the peripheral blood stream, while still protecting it from toxic substances. CVOs can be classified into (a) sensory and (b) secretory organs. The sensory organs include the area postrema (AP), the subfornical organ (SFO) and the vascular organ of lamina terminalis. They have the ability to sense plasma molecules and then pass that information into other regions of the brain. Through this, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the posterior pituitary, the pineal gland, the median eminence and the intermediate lobe of the pituitary gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli.All of the circumventricular organs, besides the SCO, contain extensive vasculature and fenestrated capillaries which leads to a ‘leaky’ BBB at the site of the organs. Furthermore, all CVOs contain neural tissue, allowing them to play a role in the neuroendocrine system. It is highly debated if the choroid plexus can be included as a CVO. It has a high concentration of fenestrated capillaries, but its lack of neural tissue and its primary role of producing cerebrospinal fluid (CSF) usually excludes the choroid plexus from the CVO classification.Research has also linked CVOs to body fluid regulation, cardiovascular functions, immune responses, thirst, feeding behavior and reproductive behavior.
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