Peripheral Nervous System - UBC Psychology`s Research Labs
... Allows researchers to determine the functions of distinct brain regions (i.e., functional localization). Involves artificially stimulating distinct regions and assessing changes in behaviour. Electrical stimulation is delivered through electrodes; the electrical current increases the firing of ...
... Allows researchers to determine the functions of distinct brain regions (i.e., functional localization). Involves artificially stimulating distinct regions and assessing changes in behaviour. Electrical stimulation is delivered through electrodes; the electrical current increases the firing of ...
Neural Communication
... An action potential is a series of events (presented in Figure 3), which involves a drastic change in the membrane's potential due to opening and closing of ion channels, and eventually results in the release of neurotransmitter. Once the membrane potential reaches approximately -65mV, a level which ...
... An action potential is a series of events (presented in Figure 3), which involves a drastic change in the membrane's potential due to opening and closing of ion channels, and eventually results in the release of neurotransmitter. Once the membrane potential reaches approximately -65mV, a level which ...
Midterm 1 - studyfruit
... ○ After one AP, it is impossible to initiate another for about 1millisec = absolute refractory period (because sodium channels deinactived (?)) ○ Relative refractory period: it can be relatively difficult to initiate another AP for several milliseconds after absolute refractory period, amount of tim ...
... ○ After one AP, it is impossible to initiate another for about 1millisec = absolute refractory period (because sodium channels deinactived (?)) ○ Relative refractory period: it can be relatively difficult to initiate another AP for several milliseconds after absolute refractory period, amount of tim ...
Regulation powerpoint File
... control and coordination of life functions and activities 2 systems involved: 1. nervous- electrical system, brain,spine and nerves found in multicellular organisms 2. endocrine- chemical system, hormones found in all organisms Nervous System: definitions: a. stimulus- change in the internal or ex ...
... control and coordination of life functions and activities 2 systems involved: 1. nervous- electrical system, brain,spine and nerves found in multicellular organisms 2. endocrine- chemical system, hormones found in all organisms Nervous System: definitions: a. stimulus- change in the internal or ex ...
Communication between Neurons
... To provide you with a list of the basic structures and chemicals involved with information passing between neurones and to describe the various steps involved. To point out how this process differs from how the message travels along the neurone. ...
... To provide you with a list of the basic structures and chemicals involved with information passing between neurones and to describe the various steps involved. To point out how this process differs from how the message travels along the neurone. ...
Unit 4 Test Study sheet
... 4. For all five senses write out the pathways for the afferent signal as it travels from the receptor until it reaches the corresponding integrating site in the brain (ascending tracts). Information covered in lecture 1. Understand the general information on properties of sensory systems. This inclu ...
... 4. For all five senses write out the pathways for the afferent signal as it travels from the receptor until it reaches the corresponding integrating site in the brain (ascending tracts). Information covered in lecture 1. Understand the general information on properties of sensory systems. This inclu ...
neuron
... Dendrites – receive messages from other cells and conduct impulses toward the cell body ...
... Dendrites – receive messages from other cells and conduct impulses toward the cell body ...
Chapter 6 - TeacherWeb
... - the nervous system includes the brain, nerves, and the spinal cord. - nerve- a tissue inside an organ in the nervous system that is made up of nerve fibers - neuron- a cell in the nerve tissue in the nervous system that carries information * nerve impulse- message that the neuron carries * dendrit ...
... - the nervous system includes the brain, nerves, and the spinal cord. - nerve- a tissue inside an organ in the nervous system that is made up of nerve fibers - neuron- a cell in the nerve tissue in the nervous system that carries information * nerve impulse- message that the neuron carries * dendrit ...
Receptor potential
... 29.10 The human retina contains two types of photoreceptors: rods and cones When rhodopsin and photopsin absorb light, – they change chemically, and – the change alters the permeability of the cell’s membrane to ions – The resulting receptor potential triggers a change in the release of neurotran ...
... 29.10 The human retina contains two types of photoreceptors: rods and cones When rhodopsin and photopsin absorb light, – they change chemically, and – the change alters the permeability of the cell’s membrane to ions – The resulting receptor potential triggers a change in the release of neurotran ...
BIOL241Neurophys11bJUL2012
... • Myelin insulates axon, prevents continuous propagation • Local current “jumps” from node to node • Depolarization occurs only at nodes ...
... • Myelin insulates axon, prevents continuous propagation • Local current “jumps” from node to node • Depolarization occurs only at nodes ...
Nerve Muscle Physiology
... – Form blood brain barrier so regulate the entry of subs from blood to brain tissue – Twist around the nerve cells and form supporting network in brain and spinal cord – Maintain chemical environment of ECF around CNS neurons – Provides Ca+ and potassium and regulate neurotransmitter level in synaps ...
... – Form blood brain barrier so regulate the entry of subs from blood to brain tissue – Twist around the nerve cells and form supporting network in brain and spinal cord – Maintain chemical environment of ECF around CNS neurons – Provides Ca+ and potassium and regulate neurotransmitter level in synaps ...
Nerve Muscle Physiology
... – Form blood brain barrier so regulate the entry of subs from blood to brain tissue – Twist around the nerve cells and form supporting network in brain and spinal cord – Maintain chemical environment of ECF around CNS neurons – Provides Ca+ and potassium and regulate neurotransmitter level in synaps ...
... – Form blood brain barrier so regulate the entry of subs from blood to brain tissue – Twist around the nerve cells and form supporting network in brain and spinal cord – Maintain chemical environment of ECF around CNS neurons – Provides Ca+ and potassium and regulate neurotransmitter level in synaps ...
Psychology 381
... Stimulus Specificity • Habituation – Quite stimulus specific – Stimulus generalization of habituation ...
... Stimulus Specificity • Habituation – Quite stimulus specific – Stimulus generalization of habituation ...
PPT - Wolfweb Websites
... The embryonic brain: – billions of neurons self-assemble into functional nervous system ...
... The embryonic brain: – billions of neurons self-assemble into functional nervous system ...
Neural Oscillators on the Edge: Harnessing Noise to Promote Stability
... Abnormal neural oscillations are implicated in certain disease states, for example repetitive firing of injured axons evoking painful paresthesia, and rhythmic discharges of cortical neurons in patients with epilepsy. In other clinical conditions, the pathological state manifests as a vulnerability ...
... Abnormal neural oscillations are implicated in certain disease states, for example repetitive firing of injured axons evoking painful paresthesia, and rhythmic discharges of cortical neurons in patients with epilepsy. In other clinical conditions, the pathological state manifests as a vulnerability ...
Test 4 Study Guide
... Most metabolic and regulatory functions in a neuron happen at the soma Dendrites are the primary site for receiving signals from other neurons Oligodendrocytes form myelin in the spinal cord. Most of the myelin sheath is composed of lipids The myelin sheath is formed by cells Conduction speed of a n ...
... Most metabolic and regulatory functions in a neuron happen at the soma Dendrites are the primary site for receiving signals from other neurons Oligodendrocytes form myelin in the spinal cord. Most of the myelin sheath is composed of lipids The myelin sheath is formed by cells Conduction speed of a n ...
Chapter 9
... Other neurotransmitters may decrease _____________________________ to __________________, ________________ the chance that it will reach _____________, and are thus _______________________. ...
... Other neurotransmitters may decrease _____________________________ to __________________, ________________ the chance that it will reach _____________, and are thus _______________________. ...
PSYCHOLOGY (8th Edition) David Myers
... If the visual cortex is damaged by stroke or other injury, patients lose the ability to see things in part of the visual field. The abnormal blind area in the visual field is called a hemianopia (hem-i-an-NO-pia). Some patients with hemianopias involving as much as half the visual field can neverthe ...
... If the visual cortex is damaged by stroke or other injury, patients lose the ability to see things in part of the visual field. The abnormal blind area in the visual field is called a hemianopia (hem-i-an-NO-pia). Some patients with hemianopias involving as much as half the visual field can neverthe ...
Nervous System - Calgary Christian School
... Neurolemma is produced by the Schwann cells in the PNS and other glial cells in the CNS, it is a membrane that promotes the regeneration of damaged axons Spaces between the myelin sheath are called Nodes of Ranvier Impulses jump from node to node. ...
... Neurolemma is produced by the Schwann cells in the PNS and other glial cells in the CNS, it is a membrane that promotes the regeneration of damaged axons Spaces between the myelin sheath are called Nodes of Ranvier Impulses jump from node to node. ...
Chapter 48
... 6. How is an action potential (nerve impulse) created? 7. Why does an action potential only travel in 1 direction? 8. How does a neuron communicate with another cell? 9. How does a single neuron interpret multiple inputs? 10. Let’s look at some neurotransmitters…. 11. How is the nervous system organ ...
... 6. How is an action potential (nerve impulse) created? 7. Why does an action potential only travel in 1 direction? 8. How does a neuron communicate with another cell? 9. How does a single neuron interpret multiple inputs? 10. Let’s look at some neurotransmitters…. 11. How is the nervous system organ ...
Nervous System Peripheral Nervous System
... Central Nervous System (CNS)Control center of the nervous system controlling both voluntary and involuntary actions ...
... Central Nervous System (CNS)Control center of the nervous system controlling both voluntary and involuntary actions ...
The Autonomic Nervous System
... There are three main levels of neural integration in the somatosensory system – Level I: The receptor level corresponding to the sensory receptors – Level II: The circuit level corresponding to the ascending pathways – Level III: The perceptual level corresponding to the awareness of the incoming st ...
... There are three main levels of neural integration in the somatosensory system – Level I: The receptor level corresponding to the sensory receptors – Level II: The circuit level corresponding to the ascending pathways – Level III: The perceptual level corresponding to the awareness of the incoming st ...
Skeletal System
... – First to those restricted to the same modality and then to those considering more than one – This allows for parallel processing of the various inputs, and results in an internal, conscious image of the stimulus ...
... – First to those restricted to the same modality and then to those considering more than one – This allows for parallel processing of the various inputs, and results in an internal, conscious image of the stimulus ...
The Nervous System
... Neurotransmitters diffuse from the end of one neuron to receptors on the next neuron. When they land on the specific receptor they allow gates to open that allow sodium to enter - this ignites the electro-chemical impulse to begin in the the next neuron. ...
... Neurotransmitters diffuse from the end of one neuron to receptors on the next neuron. When they land on the specific receptor they allow gates to open that allow sodium to enter - this ignites the electro-chemical impulse to begin in the the next neuron. ...
Rheobase
Rheobase is a measure of membrane excitability. In neuroscience, rheobase is the minimal current amplitude of infinite duration (in a practical sense, about 300 milliseconds) that results in the depolarization threshold of the cell membranes being reached, such as an action potential or the contraction of a muscle. In Greek, the root ""rhe"" translates to current or flow, and ""basi"" means bottom or foundation: thus the rheobase is the minimum current that will produce an action potential or muscle contraction.Rheobase can be best understood in the context of the strength-duration relationship (Fig. 1). The ease with which a membrane can be stimulated depends on two variables: the strength of the stimulus, and the duration for which the stimulus is applied. These variables are inversely related: as the strength of the applied current increases, the time required to stimulate the membrane decreases (and vice versa) to maintain a constant effect. Mathematically, rheobase is equivalent to half the current that needs to be applied for the duration of chronaxie, which is a strength-duration time constant that corresponds to the duration of time that elicits a response when the nerve is stimulated at twice rheobasic strength.The strength-duration curve was first discovered by G. Weiss in 1901, but it was not until 1909 that Louis Lapicque coined the term ""rheobase"". Many studies are being conducted in relation to rheobase values and the dynamic changes throughout maturation and between different nerve fibers. In the past strength-duration curves and rheobase determinations were used to assess nerve injury; today, they play a role in clinical identification of many neurological pathologies, including as Diabetic neuropathy, CIDP, Machado-Joseph Disease, and ALS.