Contemporary psychosurgery and a look to the future

2001 ◽  
Vol 95 (6) ◽  
pp. 944-956 ◽  
Author(s):  
Robert P. Feldman ◽  
Ronald L. Alterman ◽  
James T. Goodrich
Keyword(s):  
Modern Science ◽  
Psychiatric Disease ◽  
Content Type ◽  
Current State ◽  
Mind And Brain ◽  
Patient Selection Criteria ◽  
Definition Of ◽  
Historical Developments ◽  
The Mind ◽  
Fine Print

Object. Despite a long and controversial history, psychosurgery has persisted as a modern treatment option for some severe, medically intractable psychiatric disorders. The goal of this study was to review the current state of psychosurgery. Methods. In this review, the definition of psychosurgery, patient selection criteria, and anatomical and physiological rationales for cingulotomy, subcaudate tractotomy, anterior capsulotomy, and limbic leukotomy are discussed. The historical developments, modern procedures, and results of these four contemporary psychosurgical procedures are also reviewed. Examples of recent advances in neuroscience indicating a future role for neurosurgical intervention for psychiatric disease are also mentioned. Conclusions. A thorough understanding of contemporary psychosurgery will help neurosurgeons and other physicians face the ethical, social, and technical challenges that are sure to lie ahead as modern science continues to unlock the secrets of the mind and brain.

What Library 2.0 has taught libraries in Taiwan about e-learning

2015 ◽  
Vol 33 (6) ◽  
pp. 1121-1132 ◽  
Author(s):  
Tien-Chi Huang
Keyword(s):  
Educational Value ◽  
Content Type ◽  
Feedback Model ◽  
Learning Platform ◽  
Current State ◽  
Library Resources ◽  
The Status ◽  
Library Development ◽  
E Learning ◽  
Definition Of

Purpose – This paper aims to review the four elements of Library 2.0, which represents a major innovation, and adopts several pedagogical concepts to investigate other innovations libraries in Taiwan could implement to become ideal libraries. Design/methodology/approach – This paper presents an overview of the essential principles of Library 2.0 and examines the current state of libraries in Taiwan. The authors then present a reciprocal feedback model of Library 2.0+. Findings – A Library 2.0+ model and a concept map of the mutualism between e-learning education and Library 2.0+ were proposed to diminish the gap between the status quo and Library 2.0. Two recommendations are provided: to develop a library learning platform to maximize the education value of the library, and to regard library development as part of the overall community’s development. Users can access library resources anytime/anywhere by visiting the library learning platform without visiting the library. Allowing an individual approach is necessary to realize the social educational value of the library. Moreover, a Library 2.0 library engages more in community development and invites participation with participation in community first. Universities in the community would be good technology partners when developing a Library 2.0 library. Originality/value – Although there has been extensive research of library development in view of Library 2.0, such a topic has never been explored with an educational perspective, especially an e-learning perspective. Given that the definition of Library 2.0 is abstract and fairly broad, the authors take the view of an e-learning platform to make Library 2.0 more figurative. Moreover, through interdisciplinary exploration, concrete suggestions regarding library development are provided to librarians, especially those with similar conditions as those in Taiwan.

Carotid paraclinoid aneurysms with intradural origin and intracavernous location

1978 ◽  
Vol 48 (4) ◽  
pp. 526-533 ◽  
Author(s):  
Stephen Nutik
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Precise Definition ◽  
Separate Entity ◽  
Content Type ◽  
Paraclinoid Aneurysms ◽  
Planning Treatment ◽  
Definition Of ◽  
Fine Print

✓ Five cases of a congenital berry aneurysm of the internal carotid artery with origin partially intradural and fundus mainly intracavernous are presented. Angiography does not allow a precise definition of the amount of aneurysm that is intradural, a fact of importance when planning treatment of these cases. However, the angiographic features are characteristic of the type and suggest that these aneurysms be grouped together as a separate entity.

Computerized tomographic definition of mesencephalic hematoma with evacuation through pedunculotomy

1978 ◽  
Vol 49 (5) ◽  
pp. 749-752 ◽  
Author(s):  
Robin P. Humphreys
Keyword(s):  
Computerized Tomography ◽  
Hemorrhagic Stroke ◽  
Content Type ◽  
Definition Of ◽  
Fine Print

✓ A 10-year-old boy, who presented with symptoms of a progressive hemorrhagic stroke, had suffered a spontaneous midbrain hematoma. The extent of the clot was detailed by computerized tomography and the lesion was surgically removed through pedunculotomy.

High-risk mild head injury

1997 ◽  
Vol 87 (2) ◽  
pp. 234-238 ◽  
Author(s):  
John N. K. Hsiang ◽  
Theresa Yeung ◽  
Ashley L. M. Yu ◽  
Wai S. Poon
Keyword(s):  
Head Injury ◽  
High Risk ◽  
Mild Head Injury ◽  
Radiographic Findings ◽  
Content Type ◽  
Head Injured ◽  
Definition Of ◽  
Gcs Score ◽  
Injured Patients ◽  
Fine Print

✓ The generally accepted definition of mild head injury includes Glasgow Coma Scale (GCS) scores of 13 to 15. However, many studies have shown that there is a heterogeneous pathophysiology among patients with GCS scores in this range. The current definition of mild head injury is misleading because patients classified in this category can have severe sequelae. Therefore, a prospective study of 1360 head-injured patients with GCS scores ranging from 13 to 15 who were admitted to the neurosurgery service during 1994 and 1995 was undertaken to modify the current definition of mild head injury. Data regarding patients' age, sex, GCS score, radiographic findings, neurosurgical intervention, and 6-month outcome were collected and analyzed. The results of this study showed that patients with lower GCS scores tended to have suffered more serious injury. There was a statistically significant trend across GCS scores for percentage of patients with positive acute radiographic findings, percentage receiving neurosurgical interventions, and percentage with poor outcome. The presence of postinjury vomiting did not correlate with findings of acute radiographic abnormalities. Based on the results of this study, the authors divided all head-injured patients with GCS scores ranging from 13 to 15 into mild head injury and high-risk mild head injury groups. Mild head injury is defined as a GCS score of 15 without acute radiographic abnormalities, whereas high-risk mild head injury is defined as GCS scores of 13 or 14, or a GCS score of 15 with acute radiographic abnormalities. This more precise definition of mild head injury is simple to use and may help avoid the confusion caused by the current classification.

Ultrasound diagnosis of an intraneural ganglion cyst of the peroneal nerve

1992 ◽  
Vol 76 (3) ◽  
pp. 538-540 ◽  
Author(s):  
Frans S. S. Leijten ◽  
Willem-Frans Arts ◽  
Julien B. C. M. Puylaert
Keyword(s):  
Peroneal Nerve ◽  
Ganglion Cyst ◽  
Ultrasound Diagnosis ◽  
Intraneural Ganglion ◽  
Intraneural Ganglion Cyst ◽  
Content Type ◽  
Definition Of ◽  
Exact Definition ◽  
Fine Print

✓ The authors present the case of an intraneural ganglion cyst of the peroneal nerve. The cyst was diagnosed by means of ultrasound, which also gave an exact definition of its size and location, confirmed at operation. Some controversial aspects of these lesions are discussed.

Promoting intentional unlearning through an unlearning cycle

2019 ◽  
Vol 32 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Juan Gabriel Cegarra-Navarro ◽  
Anthony Wensley
Keyword(s):  
Conceptual Development ◽  
Organizational Context ◽  
Research Literature ◽  
Content Type ◽  
Current State ◽  
Widespread Agreement ◽  
Organizational Theories ◽  
Research Gap ◽  
Definition Of ◽  
The Relationship

Purpose Although there is widespread agreement about the importance of and need for unlearning particularly in an organizational context, concerns have been expressed by some researchers with respect to the coherence of the concept. The purpose of this paper is to complement organizational theories of unlearning with a clearer definition of intentional unlearning and develops an “unlearning cycle” comprising of the steps that influence unlearning focused on the need to update knowledge obtained in the past. Design/methodology/approach In this paper, the authors review both the current state of conceptual development and the empirical underpinning of the concept of unlearning and relate it to emerging literature on the links between levels of learning to then propose a conceptual framework which includes employees and managers as key actors in enabling intentional unlearning. Findings Unlearning critics have argued that unlearning has no explanatory value and is unnecessary because clear alternatives and less problematic concepts better frame the research gap that has been identified in the unlearning research literature. By addressing these concerns, this study proposes three key structures to facilitate intentional unlearning, namely, those represented by the unlearning cycle. Originality/value This study sheds light on the relationship across different unlearning levels. In addition, this study attempts to indicate how greater rigor may be brought to the development of research in the fields of intentional unlearning.

scholarly journals Positioning – a literature review

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Natasha Saqib
Keyword(s):  
Systematic Review ◽  
Literature Review ◽  
Competitive Advantage ◽  
Academic Research ◽  
Content Type ◽  
Current State ◽  
Positioning Strategy ◽  
Review Question ◽  
Definition Of ◽  
Review State

Purpose The purpose of this paper is to review state-of-the-art literature on product/brand positioning to re-examine the positioning concept and developing a more comprehensive definition from a theoretical viewpoint. Design/methodology/approach A systematic review of positioning was conducted. The review conformed to a rigorous set of core principles: it was systematic (organized according to a method designed to address the review questions), transparent (explicitly stated), reproducible and updatable and synthesized (summarized the evidence relating to the review question). Findings The literature review reveals that there is lack of coherent definition for positioning, and there is no mutual agreement among marketing scholars and practitioners about the exact meaning of the concept. Therefore, comprehensive definition of positioning encompassing the five underlying positioning perspectives (competition; empty slot/mind; consumers’ perception, differentiation and competitive advantage) is suggested. Research limitations/implications This paper will be useful for academicians to analyze the current nature of academic research in this area and will provide an added advantage to managers to design and implement positioning strategies for their product/brands that will allow their organizations to gain competitive advantage. This study acknowledges limitations with respect to its exclusive search criteria, which might affect its generalizability. Social implications Position and positioning is of relevance in society in broad terms, e.g. in sports, politics and culture. Positioning strategy is discussed and implemented in different industries (business-to-business and consumer), for all kinds of brands (including, for instance, corporate brands) and for “brands” in the very widest sense (such as places or people). Originality/value This is the first systematic review of positioning that provides a detailed understanding of the current state of positioning research on a single platform and also draws a comprehensive positioning conceptualization.

Current reporting of responsiveness in acute cerebral disorders

1988 ◽  
Vol 69 (5) ◽  
pp. 692-698 ◽  
Author(s):  
Jan-Erik Starmark ◽  
Eddy Holmgren ◽  
Daniel Stålhammar
Keyword(s):  
Head Injuries ◽  
Neurological Status ◽  
Content Type ◽  
Sum Score ◽  
Grade Scale ◽  
Patient Responsiveness ◽  
Single Method ◽  
Definition Of ◽  
The Individual ◽  
Fine Print

✓ One hundred sixty-six papers published in seven neurosurgical journals from 1983 through 1985 have been surveyed to determine the methods used for assessment of overall patient responsiveness in acute cerebral disorders (coma grading). Fifty-one different coma scales or modifications were found. The Glasgow Coma Scale (GCS) sum score (that is, the sum of the scores of the individual eye, verbal, and motor scales) dominated (54%), and was used in 73 (76%) of 96 of the head-injury studies; in 56 (77%) of these 73 studies it was the single method of grading neurological status. The GCS sum score was used in 16 (23%) of 70 studies in patients with other etiologies. The Hunt and Hess scale was used in 26 (57%) of 46 reports of patients with subarachnoid hemorrhage. In 31 (55%) of the 56 studies of head injuries using the GCS alone, it was not obvious if the 12- or 13-grade scale was used. In 13 studies (23%) no reference to methodological investigations was made. In 44 papers (79%) the handling of untestable features, such as intubation or swollen eyes, was not reported. In the 56 studies using the GCS alone, coma was defined in many different ways and in 22 studies the definition of coma was not specified. In 63% of reports, the GCS sum score scale was combined in one to five groups of scores and this was done in 32 different ways. No information was available to describe the procedure of data aggregation or the reliability of the 13-grade GCS sum score. The lack of standardization makes it unnecessarily difficult to perform valid comparisons between different series of patients. Since the GCS sum score is the most widely used scale, it is suggested that the reporting of the GCS sum score should be standardized regarding pseudoscoring, coma definition, and use of combined scores. Further studies on the reliability of the GCS sum score are needed.

Diagnosis of intraventricular and cisternal cysticercosis by computerized tomography with positive intraventricular contrast medium

1981 ◽  
Vol 55 (6) ◽  
pp. 947-951 ◽  
Author(s):  
Ignacio Madrazo ◽  
Jose A. Garcia Renteria ◽  
Gonzalo Paredes ◽  
Bernardo Olhagaray
Keyword(s):  
Contrast Medium ◽  
Computerized Tomography ◽  
Positive Contrast ◽  
Cerebral Aqueduct ◽  
Content Type ◽  
Contrast Enhanced ◽  
Definition Of ◽  
Fine Print

✓ Computerized tomography (CT) has replaced pneumoencephalography and ventriculography in the diagnosis of intraventricular cysticercosis. The authors present a refinement in the use of CT by introducing a positive contrast medium into the ventricles to increase the definition of plain and contrast-enhanced scans in the diagnosis of intraventricular cysticercosis. Eleven cases of Cysticercus cyst are presented, 10 of which were precisely delineated by CT-iodoventriculography. In the remaining case, lack of definition was due to obstruction of the cerebral aqueduct. Surgical confirmation was obtained in all cases.

The Dandy-Walker malformation

1984 ◽  
Vol 61 (3) ◽  
pp. 515-522 ◽  
Author(s):  
Jean-François Hirsch ◽  
Alain Pierre-Kahn ◽  
Dominique Renier ◽  
Christian Sainte-Rose ◽  
Elizabeth Hoppe-Hirsch
Keyword(s):  
Fourth Ventricle ◽  
High Rate ◽  
Content Type ◽  
Csf Circulation ◽  
Dandy Walker Malformation ◽  
Subarachnoid Spaces ◽  
Walker Malformation ◽  
Definition Of ◽  
Rate Of Failure ◽  
Fine Print

✓ Forty cases of Dandy-Walker malformation referred to the Hôpital Necker Enfants-Malades between 1969 and 1982 have been reviewed. The incidence of the malformation in hydrocephalus was 2.4%. There was a slight, statistically insignificant, female prevalence. Hydrocephalus should not be included in the definition of the syndrome. In 80% of the cases, it was actually a post-natal complication of the malformation and most often developed within 3 months after birth. In 80% of the cases, a communication, although insufficient, was found between the dilated 4th ventricle and the subarachnoid space. Since this communication is probably established through the foramina of Luschka, the definition of the Dandy-Walker malformation should only include atresia of the foramen of Magendie. Associated brain and systemic malformations were numerous. Among facial anomalies, facial angiomas were found in 10% of our cases. The association of facial and cardiovascular anomalies favors the hypothesis that the onset of the malformation occurs between the formation and the migration of the cells of the neural crest (that is, between the 3rd and the 4th post-ovulatory week, earlier than previously thought). Except in selected patients, membrane excision has a high rate of failure and should be abandoned. Cystperitoneal shunting avoids the risk of an entrapped fourth ventricle and is presently the best surgical procedure. The overall mortality in this series was 12.5%. Intelligence quotients were over 80 in 60% of the patients. Other studies will be necessary to understand why the communication between the fourth ventricle and the subarachnoid spaces, sufficient in utero, usually becomes insufficient for a normal cerebrospinal fluid (CSF) circulation in the first months following birth. Two hypotheses are discussed: a change in CSF circulation, or bleeding in the dilated fourth ventricle during delivery.

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