Case Study: John Woodbury - Harvard Life Science Outreach Program
... encourage students to think critically and creatively about a particular topic. The nature of this educational tool is such that students are empowered to decide the direction of their research. By giving students necessary information piecemeal, they have time to focus on details while being motiva ...
... encourage students to think critically and creatively about a particular topic. The nature of this educational tool is such that students are empowered to decide the direction of their research. By giving students necessary information piecemeal, they have time to focus on details while being motiva ...
UPMC St. Margaret Nerve Block Rotation
... Lumbar plexus blocks provide anesthesia or analgesia to the entire distribution of the plexus, including the anterolateral and medial thigh, the knee, and the saphenous nerve below the knee. Continuous infusion is always initiated after an initial bolus of dilute local anesthetic through the cathe ...
... Lumbar plexus blocks provide anesthesia or analgesia to the entire distribution of the plexus, including the anterolateral and medial thigh, the knee, and the saphenous nerve below the knee. Continuous infusion is always initiated after an initial bolus of dilute local anesthetic through the cathe ...
CHAPTER 4 How do neurons transmit information?
... Negative pole: more electrons Positive pole: fewer electrons Current: Flow of electrons from an area of higher charge (more electrons = negative pole) to an area of lower charge (fewer electrons = positive pole) Electrical potential: difference in electrical charge between negative and positive pole ...
... Negative pole: more electrons Positive pole: fewer electrons Current: Flow of electrons from an area of higher charge (more electrons = negative pole) to an area of lower charge (fewer electrons = positive pole) Electrical potential: difference in electrical charge between negative and positive pole ...
Back Injuries and Member Nerve Damage
... Back Injuries and Member Nerve Damage As a man ages, certain parts of his body are destined to feel it more than others. This is absolutely true in the case of back pain. A man can be in perfect health but then one day, out of the blue, he turns a certain way and boom – back pain becomes his constan ...
... Back Injuries and Member Nerve Damage As a man ages, certain parts of his body are destined to feel it more than others. This is absolutely true in the case of back pain. A man can be in perfect health but then one day, out of the blue, he turns a certain way and boom – back pain becomes his constan ...
PowerPoint 12: Nematoda 1
... System of lateral cords connected to a large cell ("renette") Associated with digestive system Not well-studied ...
... System of lateral cords connected to a large cell ("renette") Associated with digestive system Not well-studied ...
Acute necrotizing myopathy
... Spinal cord disorders, Gullain-Barre syndrome Chronic inflammatory demyelinating neuropathy, Diabetic polyneuropathy, Myasthenia gravis Lambert-Eaton syndrome. Metabolic Abnormalities Hypothermia ...
... Spinal cord disorders, Gullain-Barre syndrome Chronic inflammatory demyelinating neuropathy, Diabetic polyneuropathy, Myasthenia gravis Lambert-Eaton syndrome. Metabolic Abnormalities Hypothermia ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... v) There was no statistically significant difference in sensory conduction velocity in obese and controls. V. Discussion Thus in present study it was found that latency and amplitude were significantly different in obese and control group while no significant change in sensory and motor conduction v ...
... v) There was no statistically significant difference in sensory conduction velocity in obese and controls. V. Discussion Thus in present study it was found that latency and amplitude were significantly different in obese and control group while no significant change in sensory and motor conduction v ...
PSE4U1 - 10.Unit 4
... – Good insulator covering the axon between nodes, allowing transmission to be fast – Formed by Schwann Cells that wrap around some axons outside the central nervous system – Neurilemma is the outer cell membrane of a Schwann Cell – Nodes of Ranvier are indentations that exist between adjancent Schwa ...
... – Good insulator covering the axon between nodes, allowing transmission to be fast – Formed by Schwann Cells that wrap around some axons outside the central nervous system – Neurilemma is the outer cell membrane of a Schwann Cell – Nodes of Ranvier are indentations that exist between adjancent Schwa ...
Saladin 5e Extended Outline
... 4. In the CNS, each oligodendrocyte reaches out to myelinate several nerve fibers in its immediate vicinity. (Fig. 12.7b) a. Because it is anchored to multiple nerve fibers, it cannot migrate around them, so it pushes newer layers of myelin under the older ones. b. Myelination spirals inward toward ...
... 4. In the CNS, each oligodendrocyte reaches out to myelinate several nerve fibers in its immediate vicinity. (Fig. 12.7b) a. Because it is anchored to multiple nerve fibers, it cannot migrate around them, so it pushes newer layers of myelin under the older ones. b. Myelination spirals inward toward ...
Nervous System I
... A greater intensity stimulus produces a higher frequency of action potentials, not a stronger action potential. ...
... A greater intensity stimulus produces a higher frequency of action potentials, not a stronger action potential. ...
Laboratory Exercise 10: Anatomy and Physiology of the Spinal Cord
... Monosynaptic Ipsilateral (on same side) Reflex The stretch reflex has one synapse between the sensory and motor neuron. The stretch reflex is initiated when the stretch receptors or proprioceptors are stretched. The stretch receptors are stimulated on one side, cause contraction of the muscle on th ...
... Monosynaptic Ipsilateral (on same side) Reflex The stretch reflex has one synapse between the sensory and motor neuron. The stretch reflex is initiated when the stretch receptors or proprioceptors are stretched. The stretch receptors are stimulated on one side, cause contraction of the muscle on th ...
Neuronal Anatomy - VCC Library
... axon, and are called myelinated internodes. The cells are arranged with small spaces between them, called the nodes of Ranvier. ...
... axon, and are called myelinated internodes. The cells are arranged with small spaces between them, called the nodes of Ranvier. ...
action potential presen - Westgate Mennonite Collegiate
... Multiple cells provide input Input is received in different areas Input is summated to create a larger potential ...
... Multiple cells provide input Input is received in different areas Input is summated to create a larger potential ...
methods of neuroanatomy
... Much learned with this method (the only anterograde method for 70 years) ...
... Much learned with this method (the only anterograde method for 70 years) ...
Chapter 11
... cord and are part of the PNS • Ganglion = a bundle of cell bodies outside the CNS • Dorsal Root Ganglion contains the cell bodies of sensory (afferent) neurons bringing impulses to the CNS • The fusion of the dorsal and ventral roots designates the beginning of the spinal ...
... cord and are part of the PNS • Ganglion = a bundle of cell bodies outside the CNS • Dorsal Root Ganglion contains the cell bodies of sensory (afferent) neurons bringing impulses to the CNS • The fusion of the dorsal and ventral roots designates the beginning of the spinal ...
supporting cells - Daniela Sartori
... – At threshold, VG Na+ channels open – Na+ driven inward by its electrochemical gradient – This adds to depolarization, opens more channels ...
... – At threshold, VG Na+ channels open – Na+ driven inward by its electrochemical gradient – This adds to depolarization, opens more channels ...
Inverse Models Predict Mirroring Offsets and Explain the Acquisition
... Control-theoretic inverse models are very useful for learning and generating flexible sensorygoal directed motor behaviors. We have recently proposed a simple eligibility-weighted Hebbian learning rule capable of provably forming inverse models in high dimensional linear networks by associating rand ...
... Control-theoretic inverse models are very useful for learning and generating flexible sensorygoal directed motor behaviors. We have recently proposed a simple eligibility-weighted Hebbian learning rule capable of provably forming inverse models in high dimensional linear networks by associating rand ...
Heart
... Difusion - free transport of small non-polar molecules across membrane Membrane channel - transmembrane protein - transport is possible without additional energy - cell can regulate whether it is open or not (deactivated) - channel is specific for particular molecule Osmosis -solvent molecules go th ...
... Difusion - free transport of small non-polar molecules across membrane Membrane channel - transmembrane protein - transport is possible without additional energy - cell can regulate whether it is open or not (deactivated) - channel is specific for particular molecule Osmosis -solvent molecules go th ...
primary motor Cortex
... charges; the membrane potential at the peak of the action potential is +30 mV. Approximately 1 msec after Na+ channels open, they close, thus preventing any further diffusion of (+) charges into the cell. At the same time, voltage-gated K+ channels open and K+ ions leave the cell down their concentr ...
... charges; the membrane potential at the peak of the action potential is +30 mV. Approximately 1 msec after Na+ channels open, they close, thus preventing any further diffusion of (+) charges into the cell. At the same time, voltage-gated K+ channels open and K+ ions leave the cell down their concentr ...
Parts and Functions of a Nervous System
... Nerve cells or ______________ are highly specialized body cells that convey impulses from one part of the body to the CNS or vice versa. Neurons have important properties like ______________ or the ability to respond to stimuli and ________________ or the ability to transmit a signal. A neuron consi ...
... Nerve cells or ______________ are highly specialized body cells that convey impulses from one part of the body to the CNS or vice versa. Neurons have important properties like ______________ or the ability to respond to stimuli and ________________ or the ability to transmit a signal. A neuron consi ...
Review #2 - Course Notes
... 34. The branching extensions of nerve cells that receive incoming signals from sensory receptors or from other neurons are called the: a. axons. b. synapses. c. cell bodies. d. dendrites. e. neurotransmitters. 35. The nineteenth-century theory that bumps on the skull reveal a person's abilities and ...
... 34. The branching extensions of nerve cells that receive incoming signals from sensory receptors or from other neurons are called the: a. axons. b. synapses. c. cell bodies. d. dendrites. e. neurotransmitters. 35. The nineteenth-century theory that bumps on the skull reveal a person's abilities and ...
Practice Test #2
... 34. The branching extensions of nerve cells that receive incoming signals from sensory receptors or from other neurons are called the: a. axons. b. synapses. c. cell bodies. d. dendrites. e. neurotransmitters. 35. The nineteenth-century theory that bumps on the skull reveal a person's abilities and ...
... 34. The branching extensions of nerve cells that receive incoming signals from sensory receptors or from other neurons are called the: a. axons. b. synapses. c. cell bodies. d. dendrites. e. neurotransmitters. 35. The nineteenth-century theory that bumps on the skull reveal a person's abilities and ...
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.