The Nervous System
... branching, which increases their surface area to receive signals from other neurons. The number of dendrites on a neuron varies. They are called afferent processes because they transmit impulses to the neuron cell body. There is only one axon that projects from each cell body. It is usually elongate ...
... branching, which increases their surface area to receive signals from other neurons. The number of dendrites on a neuron varies. They are called afferent processes because they transmit impulses to the neuron cell body. There is only one axon that projects from each cell body. It is usually elongate ...
Students with Learning Disabilities
... by the nervous system • Theory that minimal disorders or abnormalities in the nervous system result in learning problems • Neurology is the medical specialty that focuses on the structure and function of the nervous system ...
... by the nervous system • Theory that minimal disorders or abnormalities in the nervous system result in learning problems • Neurology is the medical specialty that focuses on the structure and function of the nervous system ...
Lower Extremity Nerve Roots Pain Distribution Causative lesions
... Diabetic Amyotrophy – mm wasting in front of thigh w/ weakness & wastage due to vasc changes supplying n ...
... Diabetic Amyotrophy – mm wasting in front of thigh w/ weakness & wastage due to vasc changes supplying n ...
UNDERSTANDING MEMBRANE POTENTIAL CHANGES IN TERMS OF NERNST POTENTIALS:
... MEMORIZE THE FOLLOWING RULE: When the membrane conductance increases for a particular ion, the membrane potential will move toward the Nernst potential for that ion. For example, if the neuron is at resting potential (-70mV) and the conductance to sodium increases, the membrane potential will be dep ...
... MEMORIZE THE FOLLOWING RULE: When the membrane conductance increases for a particular ion, the membrane potential will move toward the Nernst potential for that ion. For example, if the neuron is at resting potential (-70mV) and the conductance to sodium increases, the membrane potential will be dep ...
The Nervous System
... • Result from changes in ion movement (remember that any stimulus that alters the membrane permeability to Na or K or alters the activity of the exchange pump will disturb the resting potential of the cell!) ...
... • Result from changes in ion movement (remember that any stimulus that alters the membrane permeability to Na or K or alters the activity of the exchange pump will disturb the resting potential of the cell!) ...
The Nervous System
... Nervous System Injuries Concussions • Bruise-like injury of brain • Occurs when soft tissue collides against skull • Can cause headache, dizziness, confusion, memory loss, brain damage ...
... Nervous System Injuries Concussions • Bruise-like injury of brain • Occurs when soft tissue collides against skull • Can cause headache, dizziness, confusion, memory loss, brain damage ...
Transport across cell membranes
... This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. ...
... This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. ...
The Neuron - Austin Community College
... depolarization, the slower voltage-gated K+ channels open and K+ rapidly leaves the cell following its electrochemical gradient restoring resting membrane potential Hyperpolarization The slow K+ gates remain open longer than needed to restore the resting state. This excessive efflux causes hyperpola ...
... depolarization, the slower voltage-gated K+ channels open and K+ rapidly leaves the cell following its electrochemical gradient restoring resting membrane potential Hyperpolarization The slow K+ gates remain open longer than needed to restore the resting state. This excessive efflux causes hyperpola ...
BIO201 Crimando Vocab 6 BIO201 Nervous System I Vocabulary
... Value of the resting membrane potential on a “resting” neuron: ____________________ Cation more concentrated in extracellular fluid (ECF): ____________________ Cation more concentrated in intracellular fluid (ICF): ____________________ Ion channel that opens in response to chemical binding: _______ ...
... Value of the resting membrane potential on a “resting” neuron: ____________________ Cation more concentrated in extracellular fluid (ECF): ____________________ Cation more concentrated in intracellular fluid (ICF): ____________________ Ion channel that opens in response to chemical binding: _______ ...
Chapter 7: Structure of Nervous System
... Absolute refractory period: Membrane cannot produce another AP because Na+ channels are inactivated Relative refractory period occurs when VG K+ channels are ________________, making it harder to depolarize to threshold Cable Properties Axon’s properties affect its ability to conduct current ...
... Absolute refractory period: Membrane cannot produce another AP because Na+ channels are inactivated Relative refractory period occurs when VG K+ channels are ________________, making it harder to depolarize to threshold Cable Properties Axon’s properties affect its ability to conduct current ...
Unit 1 Practice
... 1. Who is often considered the “father of psychology”? a. Wilhem Wundt b. Jean Piaget c. Sigmund Freud d. Dennis Coon 2. John B. Watson considered ___________ factors to be most influential in an individual’s development. a. environmental b. genetic c. unconscious d. cultural 3. Psychodynamic theori ...
... 1. Who is often considered the “father of psychology”? a. Wilhem Wundt b. Jean Piaget c. Sigmund Freud d. Dennis Coon 2. John B. Watson considered ___________ factors to be most influential in an individual’s development. a. environmental b. genetic c. unconscious d. cultural 3. Psychodynamic theori ...
The Nervous System - Appoquinimink High School
... 1. Each neuron is either a Sensory Neuron, a Motor Neuron or an Interneuron. 1. SENSORY NEURON: Your body senses something and sends a message to your brain or spinal cord. Afferent= bring messages into the brain. 2. MOTOR NEURON: It stimulates muscles to contract, or your body to “do” something ei ...
... 1. Each neuron is either a Sensory Neuron, a Motor Neuron or an Interneuron. 1. SENSORY NEURON: Your body senses something and sends a message to your brain or spinal cord. Afferent= bring messages into the brain. 2. MOTOR NEURON: It stimulates muscles to contract, or your body to “do” something ei ...
Nervous System Fundamentals
... b. ______________ remove the debris c. A ______________ _______ is formed by the Schwann cell neurilemma d. The tube guides the growing ______ back to its original destination e. Skeletal muscle cells _____________ when their nerve fiber is severed, but _____________ when the connection is reestabli ...
... b. ______________ remove the debris c. A ______________ _______ is formed by the Schwann cell neurilemma d. The tube guides the growing ______ back to its original destination e. Skeletal muscle cells _____________ when their nerve fiber is severed, but _____________ when the connection is reestabli ...
Chapter 48 PowerPoint 2016 - Spring
... Concept 48.3: Action potentials (nerve impulses) are the signals conducted by axons • Neurons contain gated ion channels that open or close in response to stimuli • You’ll want to review this pic after you understand the action potential ...
... Concept 48.3: Action potentials (nerve impulses) are the signals conducted by axons • Neurons contain gated ion channels that open or close in response to stimuli • You’ll want to review this pic after you understand the action potential ...
The Peripheral Nervous System The P.N.S.
... nerve impulses travel through them? 1- Sensory neuron 2- Interneuron 3- Motor neuron 4) What is the difference between a voluntary movement such as walking and an involuntary movement such as a reflex response? - Voluntary movements get processed by the brain, whereas involuntary movements only get ...
... nerve impulses travel through them? 1- Sensory neuron 2- Interneuron 3- Motor neuron 4) What is the difference between a voluntary movement such as walking and an involuntary movement such as a reflex response? - Voluntary movements get processed by the brain, whereas involuntary movements only get ...
Athletic Injuries ATC 222
... • Extrafusal vs. Intrafusal fibers • extrafusal = skeletal muscle fibers – innervated by alpha motor neurons ...
... • Extrafusal vs. Intrafusal fibers • extrafusal = skeletal muscle fibers – innervated by alpha motor neurons ...
Chapter 9 Senses - msubillings.edu
... system, resulting in suppression of the reticular formation (in the brain) creating a loss of consciousness – affects the CNS and whole body * Pain can also be influenced by inherent control systems. Gate control theory – rubbing the area where the cause of the sensation is creates action potentials ...
... system, resulting in suppression of the reticular formation (in the brain) creating a loss of consciousness – affects the CNS and whole body * Pain can also be influenced by inherent control systems. Gate control theory – rubbing the area where the cause of the sensation is creates action potentials ...
spinal cord - Dr Magrann
... cranial nerve that travels into the abdomen. This is the most important cranial nerve because it innervates all of the organs in the thoracic and abdominal cavities: heart, lungs, GI tract, etc, with parasympathetic innervation. It also moves the larynx during speech and signals the pharynx to const ...
... cranial nerve that travels into the abdomen. This is the most important cranial nerve because it innervates all of the organs in the thoracic and abdominal cavities: heart, lungs, GI tract, etc, with parasympathetic innervation. It also moves the larynx during speech and signals the pharynx to const ...
Resting membrane potential is
... Graded Potential • A weak stimulus can “depolarize” or “hyperpolarize” the membrane generating a membrane potential which is not enough to generate an action potential. This is known as graded potential • Graded potential causes potential change in limited areas • The graded potential spreads along ...
... Graded Potential • A weak stimulus can “depolarize” or “hyperpolarize” the membrane generating a membrane potential which is not enough to generate an action potential. This is known as graded potential • Graded potential causes potential change in limited areas • The graded potential spreads along ...
Neurons
... polarity of the electrical charge across the cell membrane. The membrane then alters its permeability to the charged ions, and the charge across the cell membrane becomes briefly less positive or negative. Action potentials result in the positively charged sodium ions flow rapidly into the neuron. T ...
... polarity of the electrical charge across the cell membrane. The membrane then alters its permeability to the charged ions, and the charge across the cell membrane becomes briefly less positive or negative. Action potentials result in the positively charged sodium ions flow rapidly into the neuron. T ...
Essentials of Anatony and Physiology, 5e (Martini
... Small phagocytic cells that migrate through neural tissue and engulf cellular debris, waste products, and pathogens are… The glial cells responsible for maintaining the blood-brain barrier are called … Neuroglia surrounding neuron cell bodies in the PNS that regulate the tissue environment are calle ...
... Small phagocytic cells that migrate through neural tissue and engulf cellular debris, waste products, and pathogens are… The glial cells responsible for maintaining the blood-brain barrier are called … Neuroglia surrounding neuron cell bodies in the PNS that regulate the tissue environment are calle ...
Physiological Basis of Microcurrent Therapy
... appears to heal more rapidly with micro-current application. Bioelectric currents in the body are generally found to be in the micro-amp range. Changes in the bioelectric voltage potentials across muscle cell membranes allow for more efficient membrane transport and metabolic processes. The cell's i ...
... appears to heal more rapidly with micro-current application. Bioelectric currents in the body are generally found to be in the micro-amp range. Changes in the bioelectric voltage potentials across muscle cell membranes allow for more efficient membrane transport and metabolic processes. The cell's i ...
Module overview
... moved before the representation changes.! – Resolution is defined by how close points can be and still be distinguished in the representation.! Large RF makes it difficult to associate different responses with similar points, because their representations overlap! – The boundary effects dominate whe ...
... moved before the representation changes.! – Resolution is defined by how close points can be and still be distinguished in the representation.! Large RF makes it difficult to associate different responses with similar points, because their representations overlap! – The boundary effects dominate whe ...
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.