SOP007_HoffmanReflex
... muscle fibres via a reflex loop involving sensory nerve fibres (H-reflex) as well as direct motor activation via the alpha motor neurons (M-wave). The H-reflex itself is recorded through electromyography (EMG; muscle activity) from the muscle being studied. The most common use of the H-reflex techni ...
... muscle fibres via a reflex loop involving sensory nerve fibres (H-reflex) as well as direct motor activation via the alpha motor neurons (M-wave). The H-reflex itself is recorded through electromyography (EMG; muscle activity) from the muscle being studied. The most common use of the H-reflex techni ...
Lecture 2 - Nerve Impulse
... becomes positive compared to the outside of the cell. Na+ ions move to the inside of the axon. - Repolarization - When the inside of the axon becomes negative again, after AP. K+ ions move to the outside of cell. Neuron can’t respond to new stimuli. ...
... becomes positive compared to the outside of the cell. Na+ ions move to the inside of the axon. - Repolarization - When the inside of the axon becomes negative again, after AP. K+ ions move to the outside of cell. Neuron can’t respond to new stimuli. ...
Compound Action Potential, CAP
... 1. Focal demyelination (FD): There is focal slowing of conduction across the area of demyelination. If the segment is long it is easy to detect; however, if the segment is short, one needs special techniques such as “inching” study. 2. Axon loss: The portion below the area of axon loss shows no cond ...
... 1. Focal demyelination (FD): There is focal slowing of conduction across the area of demyelination. If the segment is long it is easy to detect; however, if the segment is short, one needs special techniques such as “inching” study. 2. Axon loss: The portion below the area of axon loss shows no cond ...
Studying the concepts pg 344 1-7 Motor neurons are located in the
... potential, cells must keep a low concentration of sodium ions and high levels of potassium ions within the cell thru the sodium-potassium pump. When an axon is not conducting an impulse and the inside of the axon is negative compared to the outside it is called resting potential. ...
... potential, cells must keep a low concentration of sodium ions and high levels of potassium ions within the cell thru the sodium-potassium pump. When an axon is not conducting an impulse and the inside of the axon is negative compared to the outside it is called resting potential. ...
Powerpoint
... • All resting neurons are polarized (different charge outside than inside), – determined by ions, channel pores in membrane • K+ crosses easily; Na+ and Ca++ with more difficulty ...
... • All resting neurons are polarized (different charge outside than inside), – determined by ions, channel pores in membrane • K+ crosses easily; Na+ and Ca++ with more difficulty ...
Central Nervous System
... After inside flooded with Na+, K+ gates open (they are slower to respond) and let K+ out which are repelled by + inside Na+ gates remain closed The inside becomes negative while outside become positive and this repolarizes membrane ...
... After inside flooded with Na+, K+ gates open (they are slower to respond) and let K+ out which are repelled by + inside Na+ gates remain closed The inside becomes negative while outside become positive and this repolarizes membrane ...
Nervous System Quiz Answers
... -A resting neuron is polarized when more Na+ is outside the membrane the K+ inside the membrane (-70mv). + (pos) outside and – (neg) inside the membrane 1. Resting potential decrease as Na+ ions enter the cell making the inside more positive and outside negative. 2. Threshold of -59 mv is reached an ...
... -A resting neuron is polarized when more Na+ is outside the membrane the K+ inside the membrane (-70mv). + (pos) outside and – (neg) inside the membrane 1. Resting potential decrease as Na+ ions enter the cell making the inside more positive and outside negative. 2. Threshold of -59 mv is reached an ...
Answers - Mosaiced.org
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
Carrie Heath
... 6. Write out the Nernst Equation and the Goldmann Equation. For what reason would you use each one? 7. What experiment could be done to determine that the cell membrane of a neuron is most permeable to Potassium? 8. What experiment could you do to test the effect Sodium has on the amplitudes of peak ...
... 6. Write out the Nernst Equation and the Goldmann Equation. For what reason would you use each one? 7. What experiment could be done to determine that the cell membrane of a neuron is most permeable to Potassium? 8. What experiment could you do to test the effect Sodium has on the amplitudes of peak ...
Nerve Impulses - Tamalpais Union High School District
... invertebrates, (who live at temperatures close to 0°C), developed thick axons to speed up their responses. This explains why squid have their giant axons. • Myelin sheath - Only vertebrates have a myelin sheath surrounding their neurons. The voltage-gated ion channels are found only at the nodes of ...
... invertebrates, (who live at temperatures close to 0°C), developed thick axons to speed up their responses. This explains why squid have their giant axons. • Myelin sheath - Only vertebrates have a myelin sheath surrounding their neurons. The voltage-gated ion channels are found only at the nodes of ...
Ch. 48-49 Nervous System 9e S13
... Membrane Potential: difference in electrical charge across cell membrane ...
... Membrane Potential: difference in electrical charge across cell membrane ...
Chapter 7: The Nervous System
... Nerves – bundles of axons common to a section of the body • Types of Nerves: • Sensory: conduct impulses into the brain and spinal cord • Motor: carry impulses to muscles or gland • Mixed: contains both sensory and motor ...
... Nerves – bundles of axons common to a section of the body • Types of Nerves: • Sensory: conduct impulses into the brain and spinal cord • Motor: carry impulses to muscles or gland • Mixed: contains both sensory and motor ...
EQ2.3 - nerve cells communicate-
... the membrane due to two phenomenas: electrical and chemical movement. Next, special proteins move ions back and forth across the membrane. Nerves tend to be interconnected by forming electrical activities. They communicate through neurotransmitters with another an nerve cell or a tissue of some kind ...
... the membrane due to two phenomenas: electrical and chemical movement. Next, special proteins move ions back and forth across the membrane. Nerves tend to be interconnected by forming electrical activities. They communicate through neurotransmitters with another an nerve cell or a tissue of some kind ...
Nervous_System - Ms. Kingery`s Class
... --a nerve cell that is specialized to transfer messages in the form of fast-moving electrical energy ...
... --a nerve cell that is specialized to transfer messages in the form of fast-moving electrical energy ...
File - Mr. Haan`s Science
... 4. Resting Potential a. Nerve cells at rest b. Higher concentration of Na+ outside and higher conc. of K+ inside membrane c. Na+K+ pump works d. K+ diffuses out quickly causing the outside to be + and inside to be – in comparison e. Resting potential = difference in charges ...
... 4. Resting Potential a. Nerve cells at rest b. Higher concentration of Na+ outside and higher conc. of K+ inside membrane c. Na+K+ pump works d. K+ diffuses out quickly causing the outside to be + and inside to be – in comparison e. Resting potential = difference in charges ...
Neurology - wsscience
... differ from sensory and motor neurons because of their: Structural characteristics Inablility to generate action potentials Exclusive location in the brain and spinal cord Functional capabilities ...
... differ from sensory and motor neurons because of their: Structural characteristics Inablility to generate action potentials Exclusive location in the brain and spinal cord Functional capabilities ...
Neuron Function notes
... Nuclei = clusters of cell bodies INSIDE CNS Plexus = a complex network of nerves Comprised of nerves that are combinations of sensory and motor nerves Because of multiple branching, damage to a single root or spinal cord section DOES NOT lead to complete motor or sensory loss in the body part that i ...
... Nuclei = clusters of cell bodies INSIDE CNS Plexus = a complex network of nerves Comprised of nerves that are combinations of sensory and motor nerves Because of multiple branching, damage to a single root or spinal cord section DOES NOT lead to complete motor or sensory loss in the body part that i ...
Neurophysiology Complete
... Resting membrane potential: the difference in electrical charges that results in a voltage across the plasma membrane Polarized: a neuron at its resting membrane potential In the resting state, the predominant intracellular ion is K, Na is extracellular Resting membrane potential is maintained by th ...
... Resting membrane potential: the difference in electrical charges that results in a voltage across the plasma membrane Polarized: a neuron at its resting membrane potential In the resting state, the predominant intracellular ion is K, Na is extracellular Resting membrane potential is maintained by th ...
THE NERVOUS SYSTEM: Communication
... effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. Motor neurons. - Somatic Nervous System (skeletal muscles) - Autonomic Nervous System (smooth muscles, glands) C. Neurons: Nerve cells. Unique structure – cell body with many extensi ...
... effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. Motor neurons. - Somatic Nervous System (skeletal muscles) - Autonomic Nervous System (smooth muscles, glands) C. Neurons: Nerve cells. Unique structure – cell body with many extensi ...
What is resting membrane potential, how is it created and maintained?
... • -Separation of charges (inside more negative) • -Caused by differences in permeability between Na+ and K+ – K+ allowed to leave, and Na+ can not enter the cell ...
... • -Separation of charges (inside more negative) • -Caused by differences in permeability between Na+ and K+ – K+ allowed to leave, and Na+ can not enter the cell ...
Part 1 (nerve impulses, ppt file)
... and does in the heart. You can detect the changes in potential caused by this depolarization wave by using conductors placed on the body. This is called an electrocardiogram ...
... and does in the heart. You can detect the changes in potential caused by this depolarization wave by using conductors placed on the body. This is called an electrocardiogram ...
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.