CHAPTER 10 THE SOMATOSENSORY SYSTEM
... Figure 10-3. Rapid adaptation in a Pacinian corpuscle (top) compared with slow adaptation in Merkel's disks (bottom). When pressure is applied, the membrane potential of the rapidly adapting receptor goes back to resting level even though the pressure continues to be applied. In the slowly adapting ...
... Figure 10-3. Rapid adaptation in a Pacinian corpuscle (top) compared with slow adaptation in Merkel's disks (bottom). When pressure is applied, the membrane potential of the rapidly adapting receptor goes back to resting level even though the pressure continues to be applied. In the slowly adapting ...
Biology 218 – Human Anatomy - RIDDELL
... i. central nervous system (CNS), which consists of the brain and spinal cord ii. peripheral nervous system (PNS), which consists of [1] cranial nerves that emerge from the brain, and [2] spinal nerves that emerge from the spinal cord; the PNS contains [a] sensory or afferent neurons which transmit n ...
... i. central nervous system (CNS), which consists of the brain and spinal cord ii. peripheral nervous system (PNS), which consists of [1] cranial nerves that emerge from the brain, and [2] spinal nerves that emerge from the spinal cord; the PNS contains [a] sensory or afferent neurons which transmit n ...
The nervous system
... System we find many component systems and subdivisions The first are: a) The Central Nervous System – the brain and the spinal cord, and b) The Peripheral Nervous System – bundles of axons connecting the spinal cord and the rest of the body. ...
... System we find many component systems and subdivisions The first are: a) The Central Nervous System – the brain and the spinal cord, and b) The Peripheral Nervous System – bundles of axons connecting the spinal cord and the rest of the body. ...
PDF
... about the molecular mechanisms underlying their formation. To investigate the involvement of motoneurons in sensory neuron development, Hirohide Takebayashi and colleagues analyse sensory neuron phenotypes in the dorsal root ganglia (DRG) of Olig2 knockout mouse embryos, which lack motoneurons (see ...
... about the molecular mechanisms underlying their formation. To investigate the involvement of motoneurons in sensory neuron development, Hirohide Takebayashi and colleagues analyse sensory neuron phenotypes in the dorsal root ganglia (DRG) of Olig2 knockout mouse embryos, which lack motoneurons (see ...
17 TMJ - student.ahc.umn.edu
... Passive stability Synovial lining Proprioceptive nerve endings ...
... Passive stability Synovial lining Proprioceptive nerve endings ...
Intro Nervous System and Neurons
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
... Axon Terminals- axon ends • contain vesicles with neurotransmitters • do not touch dendrite of next neuron OR muscle – Synaptic cleft—gap between adjacent neurons – Synapse—junction between nerves ...
Changes in spinal cord
... *mainly function to control “automatic functions” such as walking or posture -tectospinal *from superior colliculus to ventral horn of cervical region *decussates at level of colliculus *only functions in upper limb/neck *tectum is associated with visual movements also- coordination of muscle with v ...
... *mainly function to control “automatic functions” such as walking or posture -tectospinal *from superior colliculus to ventral horn of cervical region *decussates at level of colliculus *only functions in upper limb/neck *tectum is associated with visual movements also- coordination of muscle with v ...
Class 10- Control and Coordination
... The ovary in females produces the hormone oestrogen which controls the production of eggs and changes during puberty. Action caused by Nervous tissue Information → Nervous tissue → Brain Muscles → Causes action Path or action- ...
... The ovary in females produces the hormone oestrogen which controls the production of eggs and changes during puberty. Action caused by Nervous tissue Information → Nervous tissue → Brain Muscles → Causes action Path or action- ...
Sensory system
... Sensory system The sensory system is composed of subsystems, each transmitting specific information to the central nervous system ...
... Sensory system The sensory system is composed of subsystems, each transmitting specific information to the central nervous system ...
Autonomic Nervous System
... - can be classified as: 1. Cholinergic - release acetylcholine - includes all sympathetic and parasympathetic preganglionic fibers - all parasympathetic postganglionic fibers - a few sympathetic postganglionic fibers - all somatic motor neurons 2. Adrenergic - release norepinephrine - most sympathet ...
... - can be classified as: 1. Cholinergic - release acetylcholine - includes all sympathetic and parasympathetic preganglionic fibers - all parasympathetic postganglionic fibers - a few sympathetic postganglionic fibers - all somatic motor neurons 2. Adrenergic - release norepinephrine - most sympathet ...
Lecture Slides - Austin Community College
... Basic structural unit of the nervous system • Specialized cells conduct electrical impulses along the plasma membrane • Nerve impulses are called action potentials Other special characteristics • Longevity – can live and function for a lifetime • Do not divide – fetal neurons lose their ability to u ...
... Basic structural unit of the nervous system • Specialized cells conduct electrical impulses along the plasma membrane • Nerve impulses are called action potentials Other special characteristics • Longevity – can live and function for a lifetime • Do not divide – fetal neurons lose their ability to u ...
Review questions for unit 2 File
... Draw a concept map that shows the functions of the inner ear Make a flow diagram showing how an individual muscle cell contracts. Make a diagram or concept map that shows the activities of the three stages of the stimulus-twitch relationship Make a concept map showing the various nerves (and functio ...
... Draw a concept map that shows the functions of the inner ear Make a flow diagram showing how an individual muscle cell contracts. Make a diagram or concept map that shows the activities of the three stages of the stimulus-twitch relationship Make a concept map showing the various nerves (and functio ...
The Child’s Growth
... Photoreceptors – one of the visual-pigment-filled light-sensitive cells at the back of the retina transduce light energy into neural impulses 2 Types of Photoreceptors: i. Cones – respond to greater light intensities, give rise to chromatic (color) sensations. ii. Rods – respond to lower light i ...
... Photoreceptors – one of the visual-pigment-filled light-sensitive cells at the back of the retina transduce light energy into neural impulses 2 Types of Photoreceptors: i. Cones – respond to greater light intensities, give rise to chromatic (color) sensations. ii. Rods – respond to lower light i ...
Chapter 2 The Neural Impulse
... 4) According to the textbook, which of the following statements is FALSE? A) Neurons in the central nervous system have myelin sheaths, while those in the peripheral nervous system do not. B) Some neurons have axons that are several feet long. C) The nerve impulse involves the exchange of electrical ...
... 4) According to the textbook, which of the following statements is FALSE? A) Neurons in the central nervous system have myelin sheaths, while those in the peripheral nervous system do not. B) Some neurons have axons that are several feet long. C) The nerve impulse involves the exchange of electrical ...
Memmler`s The Human Body in Health and
... virus remains for life in the posterior root ganglia ◦ kept in check by the immune system ...
... virus remains for life in the posterior root ganglia ◦ kept in check by the immune system ...
Nervous System Powerpoint
... the axon called myelin which (white matter) is formed by Schwann cells. • Myelin sheathing allows these neurons to conduct nerve impulses faster than in non-myelinated neurons (gray matter) • Node of Ranvier is the location where nervous impulses are conducted. ...
... the axon called myelin which (white matter) is formed by Schwann cells. • Myelin sheathing allows these neurons to conduct nerve impulses faster than in non-myelinated neurons (gray matter) • Node of Ranvier is the location where nervous impulses are conducted. ...
Neurophysiology of Pain - International Pain School
... into a nerve impulse. • For this to occur the flow of ions across the nerve membrane has to change to allow entry of either Na+ or Ca2+ ions to cause depolarization of the membrane potential. • This involves a receptor molecule that either directly or indirectly opens the ion channels. ...
... into a nerve impulse. • For this to occur the flow of ions across the nerve membrane has to change to allow entry of either Na+ or Ca2+ ions to cause depolarization of the membrane potential. • This involves a receptor molecule that either directly or indirectly opens the ion channels. ...
Communication and Control-The Nervous System chp 25-1
... • Sensory neurons gather information about what is happening in and around your body. • Neurons that send impulses from the brain and spinal cord to other systems are called motor neurons. ...
... • Sensory neurons gather information about what is happening in and around your body. • Neurons that send impulses from the brain and spinal cord to other systems are called motor neurons. ...
Burners and Stingers
... Treatment Options: Nonsurgical Treatment begins by removing the athlete from further injury. Athletes are not allowed to return to sports activity until their symptoms have been completely resolved. This can take a few minutes or several days. Athletes should never be allowed to return to sports if ...
... Treatment Options: Nonsurgical Treatment begins by removing the athlete from further injury. Athletes are not allowed to return to sports activity until their symptoms have been completely resolved. This can take a few minutes or several days. Athletes should never be allowed to return to sports if ...
THE SPINAL CORD
... of the muscle and tendon. Each tendon organ is related to a single group Ib sensory axon (the Ib axons are slightly smaller than the Ia axons that innervate the muscle spindles). In contrast to the parallel arrangement of extrafusal muscle fibers and spindles, Golgi tendon organs are in series with ...
... of the muscle and tendon. Each tendon organ is related to a single group Ib sensory axon (the Ib axons are slightly smaller than the Ia axons that innervate the muscle spindles). In contrast to the parallel arrangement of extrafusal muscle fibers and spindles, Golgi tendon organs are in series with ...
nervous system development and histology
... are the most common type of neuron (20 billion)• are all multipolar• ...
... are the most common type of neuron (20 billion)• are all multipolar• ...
Lecture 3 Slides
... • Corticobulbular pathway: most cell bodies are loacted in the cortex but synapse in the pons on the 5th, 7th, 10th, 12th, cranial nerves • Some portions project only contralaterally, some project ipsilaterally as well • The regions of the motor cortex that control movements of the upper part of the ...
... • Corticobulbular pathway: most cell bodies are loacted in the cortex but synapse in the pons on the 5th, 7th, 10th, 12th, cranial nerves • Some portions project only contralaterally, some project ipsilaterally as well • The regions of the motor cortex that control movements of the upper part of the ...
The Biology of Mind
... How a Neuron Fires It is an electrochemical process Electrical inside the neuron Chemical outside the neuron (in the synapse in the form of a neurotransmitter) The firing is call Action Potential ...
... How a Neuron Fires It is an electrochemical process Electrical inside the neuron Chemical outside the neuron (in the synapse in the form of a neurotransmitter) The firing is call Action Potential ...
3 Types of Muscle Tissue SKELETAL MUSCLE CARDIAC MUSCLE
... Striations Multinucleated due to being very active Cylindrical shape Voluntary control ...
... Striations Multinucleated due to being very active Cylindrical shape Voluntary control ...
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.