scholarly journals Razi and his Concepts on Bone and Joint Disorders

2020 ◽  
Vol 23 (9) ◽  
pp. 624-628
Author(s):  
Ahmadreza Afshar ◽  
Ali Tabrizi
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Peripheral Nervous System ◽  
The Body ◽  
Necrotic Bone ◽  
Fracture Management ◽  
Painful Hip ◽  
The Brain ◽  
Large Vessels

This brief review presents Razi’s concepts of bone and joint disorders. Razi differentiated between ligaments, tendons, and nerves and recognized the role of the brain, spinal cord, and peripheral nervous system in the perception of senses and voluntary movements. He described paralysis and loss of sensation following brain, spinal cord, and peripheral nervous system injuries. Razi presented an early concept of compartment syndrome. Razi’s approach to fracture management is very similar to the current concept of functional bracing for some fractures. Razi mentioned suturing the wounds and ligation of bleeding large vessels. He cautioned about phlebotomy in the antecubital fossa as it may become complicated by the adjacent arterial and nerve injuries. Razi treated osteomyelitis by removing the infected and necrotic bone by sawing, cutting, and rasping. He also documented arthralgia, painful hip, and sciatic pain and made a sharp distinction between arthralgia and gout. He indicated the gout origin as the production of a waste substance that the body fails to expel. Razi’s basic concepts on the bone and joint disorders established a foundation for modern orthopedic science.

scholarly journals Sampling and Evaluating the Peripheral Nervous System

2019 ◽  
Vol 48 (1) ◽  
pp. 10-18 ◽  
Author(s):  
Mark T. Butt
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Sciatic Nerve ◽  
Peripheral Nervous System ◽  
Morphological Changes ◽  
Sampling Strategy ◽  
Mechanisms Of Toxicity ◽  
Test Article ◽  
Ganglion Neurons ◽  
The Brain

Many preclinical investigations limit the evaluation of the peripheral nervous system (PNS) to paraffin-embedded sections/hematoxylin and eosin–stained sections of the sciatic nerve. This limitation ignores several key mechanisms of toxicity and anatomic differences that may interfere with an accurate assessment of test article effects on the neurons/neurites peripheral to the brain and spinal cord. Ganglion neurons may be exposed to higher concentrations of the test article as compared to neurons in the brain or spinal cord due to differences in capillary permeability. Many peripheral neuropathies are length-dependent, meaning distal nerves may show morphological changes before they are evident in the mid-sciatic nerve. Paraffin-embedded nerves are not optimal to assess myelin changes, notably those leading to demyelination. Differentiating between axonal or myelin degeneration may not be possible from the examination of paraffin-embedded sections. A sampling strategy more consistent with known mechanisms of toxicity, atraumatic harvest of tissues, optimized fixation, and the use of resin and paraffin-embedded sections will greatly enhance the pathologist’s ability to observe and characterize effects in the PNS.

scholarly journals Heterotopic ossification after central nervous system injuries: understanding of pathogenesis

2018 ◽  
Vol 25 (3-4) ◽  
pp. 119-124
Author(s):  
I. F Gareev ◽  
O. A Beylerli ◽  
A. K Vakhitov
Keyword(s):  
Spinal Cord ◽  
Central Nervous System ◽  
Nervous System ◽  
Heterotopic Ossification ◽  
Genetic Factors ◽  
Cellular Interactions ◽  
Heterotopic Ossifications ◽  
The Brain

Available data on the pathogenesis, cellular interactions, role of inflammation, humoral and genetic factors in the formation of heterotopic ossifications resulting from injuries of the brain or spinal cord are presented.

Introduction to the Nervous System

2017 ◽  
Author(s):  
Peggy Mason
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
The Body ◽  
Conscious Awareness ◽  
Sensory Stimuli ◽  
System P ◽  
Brainstem Stroke ◽  
Primary Deficit ◽  
The Central Nervous System ◽  
The Brain

The primary regions and principal functions of the central nervous system are introduced through the story of Jean-Dominique Bauby who became locked in after suffering a brainstem stroke. Bauby blinked out his story of locked-in syndrome one letter at a time. The primary deficit of locked-in syndrome is in voluntary movement because pathways from the brain to motoneurons in the brainstem and spinal cord are interrupted. Perception is also disturbed as pathways responsible for transforming sensory stimuli into conscious awareness are interrupted as they ascend through the brainstem into the forebrain. Homeostasis, through which the brain keeps the body alive, is also adversely affected in locked-in syndrome because it depends on the brain, spinal cord and autonomic nervous system. Abstract functions such as memory, language, and emotion depend fully on the forebrain and are intact in locked-in syndrome, as clearly evidenced by Bauby’s eloquent words.

Why and How Do We Hurt?

2002 ◽  
Author(s):  
Daniel J. Wallace ◽  
Janice Brock Wallace
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Clinical Situation ◽  
The Body ◽  
Sensory Pathways ◽  
System P ◽  
Chronic Pain Patients ◽  
The Central Nervous System ◽  
Pain Patients ◽  
The Brain

A fibromyalgia patient frequently complains of pain. The pain of fibromyalgia is different from that of a headache, stomach cramp, toothache, or swollen joint. It has been described as a type of stiffness or aching, often associated with spasm. Unlike the other pains mentioned above, fibromyalgia pain responds poorly to aspirin, acetaminophen (Tylenol), or ibuprofen (Advil, Motrin). In fact, studies have suggested that even narcotics such as morphine are minimally beneficial in ameliorating fibromyalgia pain. Why is it that fibromyalgia patients can take codeine, Darvon, Vicodin, or even Demerol for musculoskeletal aches and have only a slight response? What produces “pain without purpose”? In this chapter, we’ll explore what makes fibromyalgia a pain amplification syndrome. Why does the patient hurt in places where there was often no injury and all laboratory tests are normal? What creates what doctors call allodynia, or a clinical situation that results in pain from a stimulus (such as light touch) that normally should not be painful? Fibromyalgia is a form of chronic, widespread allodynia, as well as sustained hyperalgesia, or greater sensitivity than would be expected to an adverse stimulus. The nervous system consists of several components. The brain and spinal cord comprise the central nervous system. Nerves leaving the spinal cord that tell us to move our arms or legs are part of the “motor” aspects of the peripheral nervous system. Additionally, all sorts of information about touch, taste, chemicals, and pressure are relayed through “sensory” pathways back to the spinal cord, where they are processed and sent up to the brain for a response. The autonomic nervous system consists of specialized peripheral nerves. Fibromyalgia is a disorder characterized by an inappropriate neuromuscular reaction that leads to chronic pain. Patients with fibromyalgia usually react normally to acute pain. Our current concepts of the way the body responds to chronic painful stimuli stem from the gate theory, first proposed by Ronald Melzack and Patrick Wall in 1965. Nerve “wires” go from the periphery to the dorsal horn of the spinal cord. These wires are modulated by feedback loops within the nervous system.

scholarly journals Spinal cord pathways

2020 ◽  
pp. S40-S44
Author(s):  
M Dlamini
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Peripheral Nervous System ◽  
The Brain ◽  
System Knowledge

The spinal cord is the primary pathway of communication between the brain and peripheral nervous system. Knowledge of the spinal cord anatomy and recognition of typical common spinal cord syndromes are important as many of these diseases have a predilection for targeting specific areas or tracts within the spinal cord.

The effect of undernutrition on the postnatal development of the brain and cord in pigs

1967 ◽  
Vol 166 (1005) ◽  
pp. 396-407 ◽  
Keyword(s):  
Spinal Cord ◽  
Central Nervous System ◽  
Nervous System ◽  
Brain Stem ◽  
The Body ◽  
Chronological Age ◽  
Absolute Amount ◽  
The Central Nervous System ◽  
One Year ◽  
The Brain

Sucking pigs about 2 weeks old were held back by undernutrition so that they weighed only 5 to 6 kg when they were a year of age. The brain and cord developed during this time to the size to be expected in a normal pig about 10 weeks old but, although they remained immature for their chronological age, the effect on the various constituents was not uniform. The accumulation of cholesterol was less retarded than that of DNA.P or the increase in brain weight. During rehabilitation on a highly satisfactory diet the final body w eight reached at 3 1/2 years was 80 % of that to be expected in an adult pig and was equivalent only to that of a normal pig two years old. The central nervous system grew to the appropriate size for the body. The percentage of cholesterol in the central nervous system rose during rehabilitation, but, particularly in the forebrain, brain stem and spinal cord, remained subnormal for the chronological age. The deficiency of DNA- P in the rehabilitated brain was even greater, and the absolute amount finally corresponded to that found in the brain of a norm alanimal only one year of age.

Beyond the brain: Optogenetic control in the spinal cord and peripheral nervous system

2016 ◽  
Vol 8 (337) ◽  
pp. 337rv5-337rv5 ◽  
Author(s):  
Kate L. Montgomery ◽  
Shrivats M. Iyer ◽  
Amelia J. Christensen ◽  
Karl Deisseroth ◽  
Scott L. Delp
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Peripheral Nervous System ◽  
The Brain ◽  
Optogenetic Control

5. Reacting and thinking

2021 ◽  
pp. 76-88
Author(s):  
Jamie A. Davies
Keyword(s):  
Spinal Cord ◽  
Central Nervous System ◽  
Nervous System ◽  
Learning And Memory ◽  
Cell Types ◽  
The Body ◽  
The Central Nervous System ◽  
The Brain ◽  
Vast Network

This chapter assesses the nervous system. In the trunk of the body and the neck, the central nervous system (CNS) is called the spinal cord; in the head, it is called the brain. The CNS is dominated by two cell types: neurons and glia. The neurons form a vast network in which information is split, combined, and somehow processed. Examples of this processing include reflex arcs, the ‘circuitry’ that detects features such as edges in images coming from the eyes, and simple types of learning and memory. However, most other things in the brain, especially thinking and feeling, are not yet understood at all well.

scholarly journals Pathological and anatomical changes in the nervous system of dogs in case of arsenic poisoning

2020 ◽  
Vol VI (2) ◽  
pp. 139-154
Author(s):  
A. A. Tsvetaev
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Peripheral Nervous System ◽  
Positive Answer ◽  
Nerve Cells ◽  
Late Period ◽  
Anatomical Changes ◽  
Arsenic Poisoning ◽  
Complete Destruction ◽  
The Brain

A positive answer to this topic was given in 1882 by prof. N. M. Popov in his dissertation: "Materials for science on acute mellitic toxic origin". He asserts that, first of all, the nerve cells (of the spinal cord) come to a state of turbid swelling and vacuolization. Both of these processes can lead them to complete destruction: the first, through the transition to a bland, spreading formation, the second, through an increase in the vacuole. Finally, in the late period, there is a pigment atrophy, which destroys all the cells, the improvement from the previous changes. The intensity of the process is determined by the greater or lesser proximity of the vessel .... In all likelihood, the author says, the brain also changes here. With the same positivity, the suffering of the peripheral nervous system is excluded in this work.

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