Page 1 - Rochester Community Schools
... 21. Which brain area is primarily involved with understanding and producing meaningful speech? A) sensory cortex B) angular gyrus C) association areas D) Wernicke's area ...
... 21. Which brain area is primarily involved with understanding and producing meaningful speech? A) sensory cortex B) angular gyrus C) association areas D) Wernicke's area ...
THE NEURON
... The Moving Impulse A neuron remains in its resting state until it receives a stimulus large enough to start a nerve impulse. The impulse travels quickly down the axon toward the axon terminals. ...
... The Moving Impulse A neuron remains in its resting state until it receives a stimulus large enough to start a nerve impulse. The impulse travels quickly down the axon toward the axon terminals. ...
Nervous System Neurons And Synapses
... An EPSP is a depolarization produced at the postsynaptic membrane. If an EPSP depolarization reaches threshold at the axon hillock than an action potential is produced. An IPSP is a hyperpolarization produced at the postsynaptic membrane. A hyperpolarized membrane is inhibited because a larger-than- ...
... An EPSP is a depolarization produced at the postsynaptic membrane. If an EPSP depolarization reaches threshold at the axon hillock than an action potential is produced. An IPSP is a hyperpolarization produced at the postsynaptic membrane. A hyperpolarized membrane is inhibited because a larger-than- ...
NERVOUS SYSTEM - Welcome to the Health Science Program
... unmyelinated fibers ( in PNS = ganglia; in CNS = nuclei) ...
... unmyelinated fibers ( in PNS = ganglia; in CNS = nuclei) ...
File - CYPA Psychology
... 77. The hippocampus is named for its ________-like shape; the amygdala is named for its ________-like shape. A) sea horse; cashew B) hippopotamus; almond C) sea horse; almond D) tent; rectangle ...
... 77. The hippocampus is named for its ________-like shape; the amygdala is named for its ________-like shape. A) sea horse; cashew B) hippopotamus; almond C) sea horse; almond D) tent; rectangle ...
No Slide Title
... concentration of charged particles between one point and another 2. Electrical current– flow of charged particles from one point to another 3. Living cells have electrical potentials (are polarized) – resting membrane potential is -70 mV with a negative charge on the _______ of membrane; why? (next ...
... concentration of charged particles between one point and another 2. Electrical current– flow of charged particles from one point to another 3. Living cells have electrical potentials (are polarized) – resting membrane potential is -70 mV with a negative charge on the _______ of membrane; why? (next ...
Seminar Slides
... the cell body. Evaluates the total picture of EPSPs and IPSPs created in the dendrites and cell body. Action potential is generated here Net sum of depolarizing signals exceeds the threshold action potential generated ...
... the cell body. Evaluates the total picture of EPSPs and IPSPs created in the dendrites and cell body. Action potential is generated here Net sum of depolarizing signals exceeds the threshold action potential generated ...
A103 - Viktor`s Notes for the Neurosurgery Resident
... caudally, medial part of nucleus overlies rostral portion of substantia nigra. ...
... caudally, medial part of nucleus overlies rostral portion of substantia nigra. ...
Neural Basis of Motor Control
... becomes more positive and becomes depolarized. It takes longer for potassium channels to open. When they do open, potassium rushes out of the cell, reversing the depolarization. Also at about this time, sodium channels start to close. This causes the action potential to go back toward -70 mV (a repo ...
... becomes more positive and becomes depolarized. It takes longer for potassium channels to open. When they do open, potassium rushes out of the cell, reversing the depolarization. Also at about this time, sodium channels start to close. This causes the action potential to go back toward -70 mV (a repo ...
One difference between axons and dendrites is that
... One thing that differentiates neurons from other body cells is that only neurons A. contain mitochondria. B. have a nucleus in their cell body. C. have an outer membrane that acts as a filter. D. have axons and dendrites. One difference between axons and dendrites is that A. axons carry signals to t ...
... One thing that differentiates neurons from other body cells is that only neurons A. contain mitochondria. B. have a nucleus in their cell body. C. have an outer membrane that acts as a filter. D. have axons and dendrites. One difference between axons and dendrites is that A. axons carry signals to t ...
Energy Saving Accounts for the Suppression of Sensory Detail
... propose a concept model for how inhibition mechanisms might generate the observed effects of TMS. The effect is to turn off the inhibitory mechanisms, dis-inhibiting their targets. Inhibition is of course widespread in the brain, and the prefrontal cortex—the area with most development over other pr ...
... propose a concept model for how inhibition mechanisms might generate the observed effects of TMS. The effect is to turn off the inhibitory mechanisms, dis-inhibiting their targets. Inhibition is of course widespread in the brain, and the prefrontal cortex—the area with most development over other pr ...
D. Vertebrate Nervous Systems
... Gated Na+ channels open Na+ diffuses into the cell the membrane potential becomes less negative. The Action Potential: All or Nothing Depolarization. If graded potentials sum to -55mV a threshold potential is achieved. This triggers an action potential. Axons only. In the resting state ...
... Gated Na+ channels open Na+ diffuses into the cell the membrane potential becomes less negative. The Action Potential: All or Nothing Depolarization. If graded potentials sum to -55mV a threshold potential is achieved. This triggers an action potential. Axons only. In the resting state ...
Chapt13 Lecture 13ed Pt 2
... molecules are released and bind to receptors on the membrane of the receiving neuron. ...
... molecules are released and bind to receptors on the membrane of the receiving neuron. ...
LectureTest22011, the new questions
... B. 27. Sensory pathways. Choose the FALSE statement. A. The sensory information carried by the spinothalamic and dorsal column pathways comes to our consciousness, but sensory information carried by the spinocerebellar pathway does not. B. In the dorsal column patahway, the axons of the first neuron ...
... B. 27. Sensory pathways. Choose the FALSE statement. A. The sensory information carried by the spinothalamic and dorsal column pathways comes to our consciousness, but sensory information carried by the spinocerebellar pathway does not. B. In the dorsal column patahway, the axons of the first neuron ...
Neurons, Synapses, the Nervous System
... down by enzymes or taken back up into surrounding cells. There are two categories of neurotransmitters; excitatory and inhibitory. Excitatory causes depolarization of the postsynaptic membrane, whereas inhibitory causes hyperpolarization of the postsynaptic membrane. ...
... down by enzymes or taken back up into surrounding cells. There are two categories of neurotransmitters; excitatory and inhibitory. Excitatory causes depolarization of the postsynaptic membrane, whereas inhibitory causes hyperpolarization of the postsynaptic membrane. ...
peripheral nervous system
... impulses from CNS to effectors (muscles and glands) -Interneurons (association neurons) provide more complex reflexes and associative functions (learning and memory) ...
... impulses from CNS to effectors (muscles and glands) -Interneurons (association neurons) provide more complex reflexes and associative functions (learning and memory) ...
9-18-04 Nervous System Peripheral No1
... – All ganglionic transmission is cholinergic (acetylcholine) • Drugs that block ganglionic transmission block either parasympathetic or sympathetic depending on which is active • This is a paradox many have a problem grasping ...
... – All ganglionic transmission is cholinergic (acetylcholine) • Drugs that block ganglionic transmission block either parasympathetic or sympathetic depending on which is active • This is a paradox many have a problem grasping ...
Psychopharmacology
... – Causes sedation in animals – Depressive symptoms in humans • Effects can be reversed with DOPA – Led to the catecholamine theory of depression – Depression – too little catecholamine activity ...
... – Causes sedation in animals – Depressive symptoms in humans • Effects can be reversed with DOPA – Led to the catecholamine theory of depression – Depression – too little catecholamine activity ...
PowerPoint Presentation - Synapses and Electroconvulsive
... neurotransmitters, like norepinephrine can be both excitatory or inhibitory. this depends on: – The type of receptors on the post synaptic cell – How the receptors actually work • some receptors directly open an ion channel (like Acetylcholine exciting skeletal muscle cells), but some lead to furthe ...
... neurotransmitters, like norepinephrine can be both excitatory or inhibitory. this depends on: – The type of receptors on the post synaptic cell – How the receptors actually work • some receptors directly open an ion channel (like Acetylcholine exciting skeletal muscle cells), but some lead to furthe ...
Finding the missing fundamental
... only within their receptive field, which is typically a narrow range of frequencies. The marmoset neurons, however, responded not only to frequencies in their receptive fields, but also when there was no frequency within the receptive field but the other frequencies in the stimulus were harmonically ...
... only within their receptive field, which is typically a narrow range of frequencies. The marmoset neurons, however, responded not only to frequencies in their receptive fields, but also when there was no frequency within the receptive field but the other frequencies in the stimulus were harmonically ...
Title: Nervous System
... V. Signal transmission at synapses 1. The role of synapses – synapses determine the directions that the nervous signals will spread in to the nervous system. 2. Physiologic anatomy of synapses (presynaptic terminals, synaptic cleft, postsynaptic neuron). 3. The major type of synapses a) the chemical ...
... V. Signal transmission at synapses 1. The role of synapses – synapses determine the directions that the nervous signals will spread in to the nervous system. 2. Physiologic anatomy of synapses (presynaptic terminals, synaptic cleft, postsynaptic neuron). 3. The major type of synapses a) the chemical ...
axon - the long extension of a neuron that carries nerve impulses
... measure the potential energy (about -70 millivolts), like a tiny battery. When the neuron is stimulated, sodium ions can enter the cell. The potential energy (voltage) across the membrane drops. Even though the cell membrane quickly begins to restore the ions to their proper position, this change, i ...
... measure the potential energy (about -70 millivolts), like a tiny battery. When the neuron is stimulated, sodium ions can enter the cell. The potential energy (voltage) across the membrane drops. Even though the cell membrane quickly begins to restore the ions to their proper position, this change, i ...
Additional Nervous System Notes
... – pain control pathways in brain lead to neurons that carry impulses down a descending tract of the spinal cord – these neurons release enkephalins at synapses where pain signals are passed to neurons that carry them to brain – enkephalins block calcium channels in membrane of pre-synaptic neurons a ...
... – pain control pathways in brain lead to neurons that carry impulses down a descending tract of the spinal cord – these neurons release enkephalins at synapses where pain signals are passed to neurons that carry them to brain – enkephalins block calcium channels in membrane of pre-synaptic neurons a ...
Synaptic gating
Synaptic gating is the ability of neural circuits to gate inputs by either suppressing or facilitating specific synaptic activity. Selective inhibition of certain synapses has been studied thoroughly (see Gate theory of pain), and recent studies have supported the existence of permissively gated synaptic transmission. In general, synaptic gating involves a mechanism of central control over neuronal output. It includes a sort of gatekeeper neuron, which has the ability to influence transmission of information to selected targets independently of the parts of the synapse upon which it exerts its action (see also neuromodulation).Bistable neurons have the ability to oscillate between a hyperpolarized (down state) and a depolarized (up state) resting membrane potential without firing an action potential. These neurons can thus be referred to as up/down neurons. According to one model, this ability is linked to the presence of NMDA and AMPA glutamate receptors. External stimulation of the NMDA receptors is responsible for moving the neuron from the down state to the up state, while the stimulation of AMPA receptors allows the neuron to reach and surpass the threshold potential. Neurons that have this bistable ability have the potential to be gated because outside gatekeeper neurons can modulate the membrane potential of the gated neuron by selectively shifting them from the up state to the down state. Such mechanisms have been observed in the nucleus accumbens, with gatekeepers originating in the cortex, thalamus and basal ganglia.