Slide 1
... • Large myelinated fibers are affected first with initial sparing of smaller pain, thermal, and ANS fibers • Sensory loss typically occurs in this sequence ...
... • Large myelinated fibers are affected first with initial sparing of smaller pain, thermal, and ANS fibers • Sensory loss typically occurs in this sequence ...
01 - ALCA
... to vibrate at specific frequencies An action potential starts in the cochlear nerve. Continued stimulation can lead to adaptation: When the same sounds keep reaching the ears, auditory receptors tend to adapt or stop responding to those sounds. We are no longer aware of those sounds. This can ...
... to vibrate at specific frequencies An action potential starts in the cochlear nerve. Continued stimulation can lead to adaptation: When the same sounds keep reaching the ears, auditory receptors tend to adapt or stop responding to those sounds. We are no longer aware of those sounds. This can ...
... primary sensory DRG and trigeminal ganglia neurons Membrane contains receptors Classes (all located in skin and deep tissues) Thermal - extreme temperatures – A fibers Mechanical - intense pressure – A fibers - sharp pain Polymodal - intense mechanical, chemical or thermal stimuli – C fi ...
The Autonomic Nervous System
... Cardiac muscle - ANS controls rate of contraction Smooth muscle - arranged in circular layers around the walls of blood vessels, bronchioles, sphincter muscles of the GIT and urinary tract, and in visceral organs. • Single unit - connected by gap junctions, act as a unit • multi unit - contract indi ...
... Cardiac muscle - ANS controls rate of contraction Smooth muscle - arranged in circular layers around the walls of blood vessels, bronchioles, sphincter muscles of the GIT and urinary tract, and in visceral organs. • Single unit - connected by gap junctions, act as a unit • multi unit - contract indi ...
1. Dominant Optic Atrophy (DOA): Clinical, genetic and
... ultrasound imaging shows abnormalities in CTS patients. As a diagnostic test it has been suggested that ultrasound has comparable sensitivity and specificity to nerve conduction studies. Ultrasound images of the median nerve were obtained at the same time as nerve conduction studies from 280 patient ...
... ultrasound imaging shows abnormalities in CTS patients. As a diagnostic test it has been suggested that ultrasound has comparable sensitivity and specificity to nerve conduction studies. Ultrasound images of the median nerve were obtained at the same time as nerve conduction studies from 280 patient ...
Nerve Impulses - manorlakesscience
... change in the charge across the axon membrane. A nerve impulse is a wave of electrical change (an action potential) that passes rapidly along an axon. After the nerve impulse has been transmitted – the distribution of ions across the cell membrane is restored. ...
... change in the charge across the axon membrane. A nerve impulse is a wave of electrical change (an action potential) that passes rapidly along an axon. After the nerve impulse has been transmitted – the distribution of ions across the cell membrane is restored. ...
session 36 - E-Learning/An-Najah National University
... from the digestive organs (so that the bulk of the blood can be used to serve the heart, brain, and skeletal muscles) are other examples. The sympathetic nervous system is working at full speed not only when you are emotionally upset, but also when you are physically stressed. For example, if you ha ...
... from the digestive organs (so that the bulk of the blood can be used to serve the heart, brain, and skeletal muscles) are other examples. The sympathetic nervous system is working at full speed not only when you are emotionally upset, but also when you are physically stressed. For example, if you ha ...
Nervous System Neurons And Synapses
... 1. A brain tumor is found in a CT scan of Mr. Child’s head. The physician is assuming that it is not a secondary tumor (i.e., it did not spread from another part of the body) because an exhaustive workup has revealed no signs of cancer elsewhere in Mr. Childs’s body. Is the brain tumor more likely t ...
... 1. A brain tumor is found in a CT scan of Mr. Child’s head. The physician is assuming that it is not a secondary tumor (i.e., it did not spread from another part of the body) because an exhaustive workup has revealed no signs of cancer elsewhere in Mr. Childs’s body. Is the brain tumor more likely t ...
Lecture slides from 2007
... Skeletal Joints Joints can rotate along: •One axis (knee) •Two axes (wrist) •Three axes (hip) ...
... Skeletal Joints Joints can rotate along: •One axis (knee) •Two axes (wrist) •Three axes (hip) ...
Nervous-histology
... Formed by brain endothelial cells, which are connected by tight junctions with an extremely high electrical resistivity . allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion, as well as the selective transport of molecules such as glucose and amino acids tha ...
... Formed by brain endothelial cells, which are connected by tight junctions with an extremely high electrical resistivity . allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion, as well as the selective transport of molecules such as glucose and amino acids tha ...
Physio Lab 5 PhysioEx 3
... Thermal stimulation is when you made the glass warmer: did you get a larger curve? Yes, it produced a higher peak. Axons fire all the time, don’t they? So how can you get an increase in size of action potential? If you just touch superficial area of the nerve, it will only stimulate the neurons that ...
... Thermal stimulation is when you made the glass warmer: did you get a larger curve? Yes, it produced a higher peak. Axons fire all the time, don’t they? So how can you get an increase in size of action potential? If you just touch superficial area of the nerve, it will only stimulate the neurons that ...
Peripheral Nervous System
... 3. Chemoreceptors respond to chemicals changes in blood, taste, or smell. 4. Photoreceptors respond to light such as those found in the eye. C. Classification by structure- the specialized sense organs have receptors with special structures for detecting certain stimuli, the ones listed below are ge ...
... 3. Chemoreceptors respond to chemicals changes in blood, taste, or smell. 4. Photoreceptors respond to light such as those found in the eye. C. Classification by structure- the specialized sense organs have receptors with special structures for detecting certain stimuli, the ones listed below are ge ...
Chapter 12 Notes Part 1 File
... Distal tips of axons are telodendria, each of which terminates in a ...
... Distal tips of axons are telodendria, each of which terminates in a ...
24. Sensory organs
... All sensory receptors send info to the CNS via an action potential… • At the CNS, info is routed according to the stimulus and its location • The stronger the stimulus, the higher the frequency of action potentials • Some receptors adapt, that is their sensitivity to a stimulus is reduced if the st ...
... All sensory receptors send info to the CNS via an action potential… • At the CNS, info is routed according to the stimulus and its location • The stronger the stimulus, the higher the frequency of action potentials • Some receptors adapt, that is their sensitivity to a stimulus is reduced if the st ...
Cranial Nerves Special Sensory Nerves I, II and VIII
... distributed along membrane within vestibular organs two kinds of vestibular sensory organs in inner ear ...
... distributed along membrane within vestibular organs two kinds of vestibular sensory organs in inner ear ...
Zmysły chemiczne
... diameter probe activates a large population of receptors firing wiht a low rate. B. Responses of the individual Merkel disk receptors. The responses are proportional to the surface curvature and are slowly adapting. ...
... diameter probe activates a large population of receptors firing wiht a low rate. B. Responses of the individual Merkel disk receptors. The responses are proportional to the surface curvature and are slowly adapting. ...
Body Systems - Nervous System
... c. There are gaps between many of the nerve cells in your body d. The somatic nervous system allows you to feel hot and cold sensations 7. If an area of your body is particularly sensitive, what can you conclude about that area? a. It contains more skin cells than other areas of your body b. It cont ...
... c. There are gaps between many of the nerve cells in your body d. The somatic nervous system allows you to feel hot and cold sensations 7. If an area of your body is particularly sensitive, what can you conclude about that area? a. It contains more skin cells than other areas of your body b. It cont ...
Nervous System
... Located between the cerebral hemispheres and above the midbrain Composed largely of gray matter Thalamus within the diencephalon relays sensory impulses from other parts of the nervous system to the cerebral cortex Hypothalamus lies below the thalamus and maintains homeostasis by regulating a variet ...
... Located between the cerebral hemispheres and above the midbrain Composed largely of gray matter Thalamus within the diencephalon relays sensory impulses from other parts of the nervous system to the cerebral cortex Hypothalamus lies below the thalamus and maintains homeostasis by regulating a variet ...
CH 8 Nervous part 1
... In the normal communication process, dopamine is released by a neuron into the synapse, where it can bind to dopamine receptors on neighboring neurons. Normally, dopamine is then recycled back into the transmitting neuron by a specialized protein called the dopamine transporter. If cocaine is pres ...
... In the normal communication process, dopamine is released by a neuron into the synapse, where it can bind to dopamine receptors on neighboring neurons. Normally, dopamine is then recycled back into the transmitting neuron by a specialized protein called the dopamine transporter. If cocaine is pres ...
All about human eyes and ears - St Ignatius RC Primary School
... on a graph where the frequency is on the x-axis and the loudness on the y-axis. Once each frequency of hearing ability is tested and plotted, the points are joined by a line so that one can see at a glance which frequencies are not being heard normally and what degree of hearing loss may be present. ...
... on a graph where the frequency is on the x-axis and the loudness on the y-axis. Once each frequency of hearing ability is tested and plotted, the points are joined by a line so that one can see at a glance which frequencies are not being heard normally and what degree of hearing loss may be present. ...
Chapter 14 - WordPress.com
... Each peripheral nerve has 3 concentric layers of CT 1. epineurium 2. perineurium 3. endoneurium Peripheral distribution of the spinal nerves Autonomic ganglion- associated with the sympathetic division of the ANS Preganglionic axons are myelinated = white ramus Unmyelinatd postganglionic fib ...
... Each peripheral nerve has 3 concentric layers of CT 1. epineurium 2. perineurium 3. endoneurium Peripheral distribution of the spinal nerves Autonomic ganglion- associated with the sympathetic division of the ANS Preganglionic axons are myelinated = white ramus Unmyelinatd postganglionic fib ...
ppt
... • that are abrupt, pulse-like changes in the membrane potential that last a few ten thousandths of a second. • Action potentials can be divided into three phases: the resting or polarized state, depolarization, and repolarization • The amplitude of an action potential is nearly constant and is not r ...
... • that are abrupt, pulse-like changes in the membrane potential that last a few ten thousandths of a second. • Action potentials can be divided into three phases: the resting or polarized state, depolarization, and repolarization • The amplitude of an action potential is nearly constant and is not r ...
Reflexes
... Motor neuron – conducts efferent impulses from the integration center to an effector Effector – muscle fiber or gland that responds to the efferent impulse ...
... Motor neuron – conducts efferent impulses from the integration center to an effector Effector – muscle fiber or gland that responds to the efferent impulse ...
Microneurography
Microneurography is a neurophysiological method employed by scientists to visualize and record the normal traffic of nerve impulses that are conducted in peripheral nerves of waking human subjects. The method has been successfully employed to reveal functional properties of a number of neural systems, e.g. sensory systems related to touch, pain, and muscle sense as well as sympathetic activity controlling the constriction state of blood vessels. To study nerve impulses of an identified neural system, a fine tungsten needle electrode is inserted into the nerve and connected to a high gain recording amplifier. The exact position of the electrode tip within the nerve is then adjusted in minute steps until the electrode discriminates impulses of the neural system of interest. A unique feature and a significant strength of the microneurography method is that subjects are fully awake and able to cooperate in tests requiring mental attention, while impulses in a representative nerve fibre or set of nerve fibres are recorded, e.g. when cutaneous sense organs are stimulated or subjects perform voluntary precision movements.