Traumatic brain injury (TBI) causes two injury types: primary and secondary. In infants and young children, nonaccidental TBI is an important etiology of brain injury and is commonly a repetitive insult. TBI is by far the most common cause of acquired brain injury (ABI) in children and is the most common cause of death in cases of childhood injury. In 2009, the Pediatric Emergency Care Applied Research Network (PECARN) issued validated prediction rules to identify children at very low risk of clinically important TBI, which is defined as TBI requiring neurosurgical intervention or leading to death. The range of outcomes in pediatric TBI is very broad, from full recovery to severe physical and/or intellectual disabilities. Children and adolescents who have suffered a TBI are at increased risk of social dysfunction. Studies show that these patients can have poor self-esteem, loneliness, maladjustment, reduced emotional control, and aggressive or antisocial behavior.
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This book provides school personnel with information on how concussion (mild traumatic brain injury) can affect learning, mental health, and social-emotional functioning, skills in developing and leading a school-based concussion support team, tools for school-based concussion assessment, and information on a safe, gradual process of returning to the academic environment. It explains what happens to the brain at the moment of impact, terminology, prevalence rates, causes, risk factors, and issues related to underreporting of concussions. Educators will learn about developmental effects, how concussions can affect students of different ages, as well as difficulties that can result from concussions such as postconcussion syndrome and second impact syndrome. This book presents a school-based concussion team model, including the specific responsibilities of the concussion team leader (CTL), and a discussion of maintaining student privacy through regulations like the Health Insurance Portability and Accountability Act of 1996. Readers are familiarized with checklists that can be used within the school and assessment tools such as Acute Concussion Evaluation (ACE) and neuropsychological assessment. Readers are also familiarized with how physical and cognitive rest can be balanced with a return to activity during the recovery period. This book also book gives concussion team members guidance on the selection of appropriate strategies, as well as decision making during a student’s return to academics, and discusses concussion prevention information by providing guidance on how readers might train others on concussion recognition and response. Case studies are integrated throughout the chapters.
This chapter includes information related to the clinical evaluation of a concussion that a child might receive in a medical setting. It discusses guidelines for appropriate use of smartphone concussion evaluation apps. This chapter examines a brief section on the future of concussion assessment. The Acute Concussion Evaluation (ACE) can help the school concussion team obtain information regarding the injury, including the cause, severity, any amnesia, loss of consciousness (LOC), and any early signs. The computerized neurocognitive assessment typically measures player symptoms, verbal/visual memory, attention span, working memory, processing speed, response variability, nonverbal problem solving, and reaction time. Neurocognitive tests, sideline assessments, and smartphone apps can help district staff and parents determine the severity of a student’s symptoms. A neuropsychological assessment to assess cognitive functioning, memory, speed, and processing time may also be administered.
This chapter focuses on an area that has been at the center of the debate between the approaches: processing ambiguous words and sentences. Interestingly, an important factor for ambiguity resolution appears to be the frequency of the different meanings of the ambiguous words. Subordinate- bias effect is as follows: in a neutral, nonbiasing context, words that are balanced cause longer reading times than words that are either unbalanced or unambiguous. Different languages impose different rules about how grammatical categories may be combined. In the garden path model, sentence processing happens in two stages: an initial structure building stage in which the only information that is used is syntactic, and then a second stage in which the structure is checked against semantic and pragmatic information. Constraint-based models take a very different approach to how sentences are initially parsed and how mistakes are sometimes made.
Delirium, also known as acute confusional state, organic brain syndrome, brain failure, and encephalopathy, is a common occurrence among medical and surgical patients and causes extensive morbidity and mortality. This chapter provides an updated review of delirium, including pathophysiological correlates, clinical features, diagnostic considerations, and contemporary treatment options. The defining features of delirium include an acute change in mental status characterized by altered consciousness, cognition, and fluctuations. The chapter explores the risk factors for delirium. These can be divided into two categories: predisposing factors and precipitating factors. Imbalances in the synthesis, release, and degradation in gamma-aminobutyric acid (GABA), glutamate, acetylcholine, and the monoamines have also been hypothesized to have roles in delirium. GABA is the primary inhibitory neurotransmitter in the central nervous system (CNS) and medications such as benzodiazepines and propofol have known actions at GABA receptors and have been associated with delirium.
The researchers were specifically interested in whether they would get more incorrect responses depending on the type of sentence. From a certain perspective, passive sentences are more complicated than active sentences and so perhaps it is the case that passives are more difficult simply because they are more complicated. It appears that the important difference between subject cleft and actives on one hand, and passives on the other, is that the order of the roles is reversed between them: in active sentences, the agent comes first. Indeed, there is a growing body of evidence that languages allow English speakers to structure their utterances in a way that can flag certain parts of the sentence as particularly important or worthy of special attention. Recently, psycholinguists have been interested, too, in how information structure influences language processing.
The study of the properties of language can be divided up into roughly five, somewhat overlapping categories: sound system, word structure, sentence structure, meaning, and real-world use. In spoken languages, segments are sounds—each language has a set of sounds that are produced by changing the positions of various parts of the vocal tract. The sound system of language is actually studied in two main parts: phonetics, phonology. Phonemes can be combined to make words, and words themselves have an internal structure and can even be ambiguous based on this structure. Syntax is the study of how sentences are formed. There are two noun phrases (NPs) in the sentence—the artist and a paintbrush. The field of semantics is concerned with meaning in language and can be divided into two major parts: lexical and propositional.
This chapter examines disability identity as a unique area in which the clinician working with individuals with brain injuries must become culturally competent. It begins with an overview of the disability rights movement and its influence on disability identity as a construct. Legislative and regulatory scaffolding for societal responsiveness to and acceptance of individuals with disability exists, but it requires further refinement. Social agencies have been created to support the process of adaptation to disability culture and are attempting to foster development of disability identity through networking resources for employment and socialization. The chapter then discusses critical issues in cultural competence and how these intersect with ethical practice in working with individuals and families with neurorehabilitation needs. It concludes with suggestions regarding cultural competence that transcend individual diagnoses.
Primary progressive aphasia (PPA) is the term applied to a clinical syndrome characterized by insidious progressive language impairment that is initially unaccompanied by other cognitive deficits. This chapter describes several variants of PPA and more than one etiology. It explains three main variants of PPA, namely, semantic Variant of PPA (svPPA), nonfluent/agrammatic variant of PPA (nfvPPA) and logopenic variant of PPA (lvPPA), and also describes criteria for their diagnoses. The defining symptom of PPA is the presence of a language impairment for at least 2 years in the absence of any other significant cognitive problem. Assessment of other cognitive domains is challenging because many tests of memory, attention, executive functioning, and visual-spatial skills rely on language processes in some manner. There are no drug therapies proven to arrest progression of signs and symptoms of PPA due to frontotemporal lobar dementia (FTLD) or Alzheimer’s disease (AD) pathologies.
This chapter talks about questions related to how speakers and hearers influence each other. It looks at research on dialogue, and especially how a dialogue context influences speakers. Speakers have an impact on their listeners. The goal of a dialogue is successful communication and so it would make sense that a speaker would pay careful attention to the needs of a listener and do things like avoid ambiguity and package information in a way that flags particular information as important or new to the listener. Ambiguity may be avoided depending on the speaker’s choice of words and so a natural question is whether, and when, speakers appear to avoid ambiguous language. In terms of pronunciation, speakers reduce articulation and intelligibility over the course of a dialogue. There are some constraints and preferences on how to interpret pronouns and other coreferring expressions that appear to be structural or syntactic in nature.