The Nervous System
... • To identify the basic structure of a neuron. • To explain the main components of the nervous system. • To compare and contrast the central nervous system and the peripheral nervous system. • To differentiate between the somatic and autonomic nervous systems. ...
... • To identify the basic structure of a neuron. • To explain the main components of the nervous system. • To compare and contrast the central nervous system and the peripheral nervous system. • To differentiate between the somatic and autonomic nervous systems. ...
Cranial Nerve II - Maryville University
... gets inside the skull, it bifurcates. One branch ends in dorsal cochlear nucleus and the other ends in ventral cochlear nucleus. Fibers from ventral cochelear partly cross and terminate to the superior olivary nucleus. Axons from superior olivary nucleus then terminate to inferior colliculus via lat ...
... gets inside the skull, it bifurcates. One branch ends in dorsal cochlear nucleus and the other ends in ventral cochlear nucleus. Fibers from ventral cochelear partly cross and terminate to the superior olivary nucleus. Axons from superior olivary nucleus then terminate to inferior colliculus via lat ...
human anatomy - WordPress.com
... • Relays info by way of afferent fibers to the CNS • Efferent fibers relay info from CNS to muscles and glands • Divided into two parts: - 12 pairs of cranial nerves - 31 pairs of spinal nerves ...
... • Relays info by way of afferent fibers to the CNS • Efferent fibers relay info from CNS to muscles and glands • Divided into two parts: - 12 pairs of cranial nerves - 31 pairs of spinal nerves ...
Chapter 15 - missdannocksyear11biologyclass
... neuron to the CNS where interneurons connect this neuron to motor neruron to send a message back to an effector mucle to contract and escape the stimulus causing the pain. ...
... neuron to the CNS where interneurons connect this neuron to motor neruron to send a message back to an effector mucle to contract and escape the stimulus causing the pain. ...
Nervous System
... beginning of the axon, it must “travel” (propagate) along the length of the axon to the axon terminus • The influx of Na+ into the cell during depolarization causes the membrane potential in “front” of the opened Na+ channels to depolarize to threshold • Reaching threshold opens up the Na+ channels ...
... beginning of the axon, it must “travel” (propagate) along the length of the axon to the axon terminus • The influx of Na+ into the cell during depolarization causes the membrane potential in “front” of the opened Na+ channels to depolarize to threshold • Reaching threshold opens up the Na+ channels ...
chapt10_holes_lecture_animation
... List the functions of sensory receptors. Describe how the nervous system responds to stimuli. 10.3: Description of Cells of the Nervous System Describe the three major parts of a neuron. Define neurofibrils and chromatophilic substance. ...
... List the functions of sensory receptors. Describe how the nervous system responds to stimuli. 10.3: Description of Cells of the Nervous System Describe the three major parts of a neuron. Define neurofibrils and chromatophilic substance. ...
PowerPoint to accompany Hole’s Human Anatomy and
... List the functions of sensory receptors. Describe how the nervous system responds to stimuli. 10.3: Description of Cells of the Nervous System Describe the three major parts of a neuron. Define neurofibrils and chromatophilic substance. ...
... List the functions of sensory receptors. Describe how the nervous system responds to stimuli. 10.3: Description of Cells of the Nervous System Describe the three major parts of a neuron. Define neurofibrils and chromatophilic substance. ...
The Nervous System
... Preganglionic Fibers originate in the gray matter of the spinal cord The axons leave through ventral roots traveling a short distance They leave the spinal nerves and enter a member of the paravertebral ...
... Preganglionic Fibers originate in the gray matter of the spinal cord The axons leave through ventral roots traveling a short distance They leave the spinal nerves and enter a member of the paravertebral ...
brain - Austin Community College
... There are 3 classes of neurons 1. Afferent – transmit sensory impulses from PNS to the CNS. - Sensory afferent fibers – carry impulses from skin, skeletal muscles, and joints - Visceral afferent fibers – transmit impulses from visceral organs 2. Efferent - transmit motor impulses from CNS to PNS - S ...
... There are 3 classes of neurons 1. Afferent – transmit sensory impulses from PNS to the CNS. - Sensory afferent fibers – carry impulses from skin, skeletal muscles, and joints - Visceral afferent fibers – transmit impulses from visceral organs 2. Efferent - transmit motor impulses from CNS to PNS - S ...
9d. Know the functions of the nervous system and the role of
... • The sympathetic and parasympathetic nervous systems have opposite effects on the same organ system. • These opposing effects help maintain _________________________. ...
... • The sympathetic and parasympathetic nervous systems have opposite effects on the same organ system. • These opposing effects help maintain _________________________. ...
The Nervous System
... of nerve cells: a. Sensory nerve cells receive information and send impulses to the brain or spinal cord. b. Interneurons relay the impulses from sensory nerve cells to motor nerve cells. c. Motor nerve cells conduct impulses from the brain to muscles and ...
... of nerve cells: a. Sensory nerve cells receive information and send impulses to the brain or spinal cord. b. Interneurons relay the impulses from sensory nerve cells to motor nerve cells. c. Motor nerve cells conduct impulses from the brain to muscles and ...
Neuron PowerPoint
... For example, your friend is talking in a low voice, so low that you don’t even hear it. Stimulus threshold is the lowest your friend can talk to you so that you actually pick up the sound, which is why the definition states that it is the minimum amount of information. ...
... For example, your friend is talking in a low voice, so low that you don’t even hear it. Stimulus threshold is the lowest your friend can talk to you so that you actually pick up the sound, which is why the definition states that it is the minimum amount of information. ...
Chapter 5: sensation PAGE 1 Table 1: Sensing the World: Some
... (a) Phantom Limb- This is when a person feels pain in a limb that is not existing, or when the brain misinterprets the spontaneous central nervous system activity that occurs in the absence of normal sensory input. This may be cause because pain is not only a sense but also from the brain. (b) Gate ...
... (a) Phantom Limb- This is when a person feels pain in a limb that is not existing, or when the brain misinterprets the spontaneous central nervous system activity that occurs in the absence of normal sensory input. This may be cause because pain is not only a sense but also from the brain. (b) Gate ...
File - Ms Curran`s Leaving Certificate Biology
... electrical impulse travels along the dendrite & axon to the neurotransmitter swellings The movement of the electrical impulse along a neuron involves the movement of ions. When an neuron is Not carrying an impulse ions are pumped in & out of the axon. This results in the inside of the axon being ...
... electrical impulse travels along the dendrite & axon to the neurotransmitter swellings The movement of the electrical impulse along a neuron involves the movement of ions. When an neuron is Not carrying an impulse ions are pumped in & out of the axon. This results in the inside of the axon being ...
lecture #6
... • Saltatory conduction -depolarization only at nodes of Ranvier - areas along the axon that are unmyelinated and where there is a high density of voltage-gated ion channels -current carried by ions flows through extracellular fluid from node to node ...
... • Saltatory conduction -depolarization only at nodes of Ranvier - areas along the axon that are unmyelinated and where there is a high density of voltage-gated ion channels -current carried by ions flows through extracellular fluid from node to node ...
Lesson1 Powerpoint
... Sensory transduction Transforming external physical forces/energy into electrical impulses that are mediated by neural spikes. Neural “encoding” ...
... Sensory transduction Transforming external physical forces/energy into electrical impulses that are mediated by neural spikes. Neural “encoding” ...
Temporal Aspects of Visual Extinction
... – Damage to LMN eliminates the function of the motor unit – Lesion affecting the LMN causes weakness of muscles and reduces tendon reflexes – Muscle tone is flaccid – Can be seen in muscular dystrophy and ...
... – Damage to LMN eliminates the function of the motor unit – Lesion affecting the LMN causes weakness of muscles and reduces tendon reflexes – Muscle tone is flaccid – Can be seen in muscular dystrophy and ...
Document
... Sensory transduction Transforming external physical forces/energy into electrical impulses that are mediated by neural spikes. Neural “encoding” ...
... Sensory transduction Transforming external physical forces/energy into electrical impulses that are mediated by neural spikes. Neural “encoding” ...
Neuron Teacher Key 5-17-16
... 13. What is a synapse? Identify where synapse junctions may occur in the body. A synapse is the junction where a neuron communicates with another cell across a ...
... 13. What is a synapse? Identify where synapse junctions may occur in the body. A synapse is the junction where a neuron communicates with another cell across a ...
Chapter 48 p. 1040-1053
... long-term depression (LTD): postsynaptic cell’s decreased responsiveness to action potential long-term potentiation(LTP): enhanced responsiveness to action potentials; associated with release of neurotransmitter glutamate (binds with receptors to open gated channels that let in a lot of calcium, ...
... long-term depression (LTD): postsynaptic cell’s decreased responsiveness to action potential long-term potentiation(LTP): enhanced responsiveness to action potentials; associated with release of neurotransmitter glutamate (binds with receptors to open gated channels that let in a lot of calcium, ...
5 Nervous Tissue Lab 2011
... The sciatic nerve is a mixed nerve, containing sensory axons from neuron cell bodies in dorsal root ganglia and motor axons from neurons in spinal cord gray matter. Like all larger peripheral nerves bundles, it is also mixed in the sense of containing both somatic and autonomic nerve fibers. Scan th ...
... The sciatic nerve is a mixed nerve, containing sensory axons from neuron cell bodies in dorsal root ganglia and motor axons from neurons in spinal cord gray matter. Like all larger peripheral nerves bundles, it is also mixed in the sense of containing both somatic and autonomic nerve fibers. Scan th ...
The Nervous System - Plain Local Schools
... sodium ions (Na+) outside and a relatively greater concentration of potassium ions (K+) inside • The cytoplasm of these cells has many large negatively charged particles that cannot diffuse across the cell membranes. ...
... sodium ions (Na+) outside and a relatively greater concentration of potassium ions (K+) inside • The cytoplasm of these cells has many large negatively charged particles that cannot diffuse across the cell membranes. ...
Brain Anatomy and Function p. 95
... gait and uncoordinated intentional movement), intention tremor, decreased reflexes, and nystagmus. Cerebellar ataxia may be caused by malnutrition in severe, prolonged alcoholism. ...
... gait and uncoordinated intentional movement), intention tremor, decreased reflexes, and nystagmus. Cerebellar ataxia may be caused by malnutrition in severe, prolonged alcoholism. ...
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.