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. ...
Chapter 14:
... which is made up of dead skin cells. – Dermis is below the epidermis and contains mechanoreceptors that respond to stimuli such as pressure, stretching, and vibration. ...
... which is made up of dead skin cells. – Dermis is below the epidermis and contains mechanoreceptors that respond to stimuli such as pressure, stretching, and vibration. ...
Innervation of the Eye and Orbit
... There are a lot of terms, anatomy and pathways you’ll need to know. ...
... There are a lot of terms, anatomy and pathways you’ll need to know. ...
E.2 Perception of Stimuli
... blurred the image because the optic nerve can’t perceive ______ where the stimulus is coming from • Thus rod information is ________ and cone info. is ___________ ...
... blurred the image because the optic nerve can’t perceive ______ where the stimulus is coming from • Thus rod information is ________ and cone info. is ___________ ...
NERVOUS SYSTEM
... glands (effectors) Organization of Nervous System – 2 subdivisions: Central Nervous (CNS) – consist of the brain and spinal cord; the function is integration Peripheral Nervous (PNS) – consist of nerves extending from the brain and spinal cord to the body; the functions are sensory input and mot ...
... glands (effectors) Organization of Nervous System – 2 subdivisions: Central Nervous (CNS) – consist of the brain and spinal cord; the function is integration Peripheral Nervous (PNS) – consist of nerves extending from the brain and spinal cord to the body; the functions are sensory input and mot ...
Methylene Blue prepRH 2013
... Drop the saline level just below the level of your dissection—the idea is not to flood the ganglion & muscle with saline. Cut a strip of kimwipe or tissue to just cover the ganglion & connective and another strip of tissue to cover the muscle layer. Apply a few drops of methylene blue solution (diss ...
... Drop the saline level just below the level of your dissection—the idea is not to flood the ganglion & muscle with saline. Cut a strip of kimwipe or tissue to just cover the ganglion & connective and another strip of tissue to cover the muscle layer. Apply a few drops of methylene blue solution (diss ...
CH005a NERVOUS SYS - INTRO 10-22
... Neurons Functional unit of nervous system Have capacity to produce action ...
... Neurons Functional unit of nervous system Have capacity to produce action ...
CHAPTER 3 – THE BIOLOGICAL BASIS OF BEHAVIOUR
... The cerebral cortex is the outer layer of the brain. The cerebral cortex processes complex mental data and is called the “grey matter” of the brain. The cortex surrounds the cerebrum, with comprises symmetrical hemispheres (left and right). Both the left hemisphere and the right hemisphere have spec ...
... The cerebral cortex is the outer layer of the brain. The cerebral cortex processes complex mental data and is called the “grey matter” of the brain. The cortex surrounds the cerebrum, with comprises symmetrical hemispheres (left and right). Both the left hemisphere and the right hemisphere have spec ...
The Autonomic Nervous System
... Muscarinic receptors occur on all effector cells stimulated by postganglionic cholinergic fibers ...
... Muscarinic receptors occur on all effector cells stimulated by postganglionic cholinergic fibers ...
Anatomy of the Spinal Cord
... located in the ventral horns (similar neurons in the lateral horn are the preganglionic neurons of the autonomic system). ...
... located in the ventral horns (similar neurons in the lateral horn are the preganglionic neurons of the autonomic system). ...
Chapter 33
... The nerve impulse travels along the axon or dendrites as an electrical current gathered by ions moving in and out of the neuron through voltage-gated channels. Voltage-gated channels – protein channels in the membrane that open & close in response to an electrical ...
... The nerve impulse travels along the axon or dendrites as an electrical current gathered by ions moving in and out of the neuron through voltage-gated channels. Voltage-gated channels – protein channels in the membrane that open & close in response to an electrical ...
Lecture 12 - Taft College
... discrete pathways (nerves) and local actions. – The effects of nervous stimulation are usually immediate and short lived. • E.g. muscle movement ...
... discrete pathways (nerves) and local actions. – The effects of nervous stimulation are usually immediate and short lived. • E.g. muscle movement ...
see p. D20 - Viktor`s Notes for the Neurosurgery Resident
... – myopathic potentials - ↓duration & amplitude (i.e. recruitment density is normal, but envelope amplitude is reduced); pathognomonic finding of myopathy: full recruitment in weak, wasted muscle. – ↑incidence of polyphasic potentials. – because individual motor units generate less tension than norma ...
... – myopathic potentials - ↓duration & amplitude (i.e. recruitment density is normal, but envelope amplitude is reduced); pathognomonic finding of myopathy: full recruitment in weak, wasted muscle. – ↑incidence of polyphasic potentials. – because individual motor units generate less tension than norma ...
by David Zimmerman The ultimate in nerve regeneration
... In a very recent experiment, G u t h and his University of Maryland co-worker, pharmacologist Edson X. Albuquerque, eliminated scar formation as a variable in their work with another animal, the thirteen-lined ground s q u i r r e l . T h e s e s q u i r r e l s are l o n g a n d profound hibernator ...
... In a very recent experiment, G u t h and his University of Maryland co-worker, pharmacologist Edson X. Albuquerque, eliminated scar formation as a variable in their work with another animal, the thirteen-lined ground s q u i r r e l . T h e s e s q u i r r e l s are l o n g a n d profound hibernator ...
Pain
... Figure 14.3 The pathway from receptors in the skin to the somatosensory receiving area of the cortex. The fiber carrying signals from a receptor in the finger enters the spinal cord through the dorsal root and then travels up the spinal cord in two pathways: the medial lemniscus and the spinothalam ...
... Figure 14.3 The pathway from receptors in the skin to the somatosensory receiving area of the cortex. The fiber carrying signals from a receptor in the finger enters the spinal cord through the dorsal root and then travels up the spinal cord in two pathways: the medial lemniscus and the spinothalam ...
Nervous System - Effingham County Schools
... the arm where the nerve is not protected. The “funny bone” is on the elbow. ...
... the arm where the nerve is not protected. The “funny bone” is on the elbow. ...
Central Nervous System
... the central nervous system. These nerves coordinate messages between all parts of the body and the central nervous system (brain and spine) ...
... the central nervous system. These nerves coordinate messages between all parts of the body and the central nervous system (brain and spine) ...
Anatomy of the 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 ...
in the central nervous system
... TRANSMISSION AT THE SYNAPSE Axon of a neuron ends at the synaptic knob where the impulse must be carried to the axon (or dendrite) of the next neuron (across the ...
... TRANSMISSION AT THE SYNAPSE Axon of a neuron ends at the synaptic knob where the impulse must be carried to the axon (or dendrite) of the next neuron (across the ...
Physiology – spinal anesthesia MGMC
... Stimulate the nerve - more channels open – easily blocked ( frequency dependent blockade ) ...
... Stimulate the nerve - more channels open – easily blocked ( frequency dependent blockade ) ...
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.