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Anosmia

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https://www.readbyqxmd.com/read/28918916/olfactory-deficits-decrease-the-time-resolution-for-trigeminal-lateralization
#1
A Oleszkiewicz, T Meusel, M Güpfert, B Westermann, T Hummel, A Welge-Lüssen
OBJECTIVES: To date the temporal resolution of the detection of almost simultaneously applied intranasal trigeminal stimuli is unknown. The aim of our study was to examine this temporal resolution in an/hyposmic subjects, who are known to have reduced trigeminal sensitivity and compare it with healthy controls. METHODS: Participants were 20 posttraumatic an/hyposmic patients, and 23 healthy controls (matched with regard to sex and age). Olfactory function was tested psychophysically using the Sniffin´ Sticks test battery...
September 15, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28915117/molecular-genetic-and-clinical-delineation-of-22-patients-with-congenital-hypogonadotropic-hypogonadism
#2
Kohei Aoyama, Haruo Mizuno, Tatsushi Tanaka, Takao Togawa, Yutaka Negishi, Kei Ohashi, Ikumi Hori, Masako Izawa, Takashi Hamajima, Shinji Saitoh
BACKGROUND: Congenital hypogonadotropic hypogonadism (CHH) is classified as Kallmann syndrome (KS) with anosmia/hyposmia or normosmic (n)CHH. Here, we investigated the genetic causes and phenotype-genotype correlations in Japanese patients with CHH. METHODS: We enrolled 22 Japanese patients with CHH from 21 families (18 patients with KS and 4 with nCHH) and analyzed 27 genes implicated in CHH by next-generation and Sanger sequencing. RESULTS: We detected 12 potentially pathogenic mutations in 11 families, with three having a mutation in ANOS1 (X-linked recessive); three and four having a mutation in FGFR1 and CHD7, respectively (autosomal dominant); and one having two TACR3 mutations (autosomal recessive)...
September 15, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28904827/horizontal-distance-of-anterior-communicating-artery-aneurysm-neck-from-anterior-clinoid-process-is-critically-important-to-predict-postoperative-complication-in-clipping-via-pterional-approach
#3
Takashi Fujii, Naoki Otani, Satoru Takeuchi, Terushige Toyooka, Kojiro Wada, Kentaro Mori
BACKGROUND: The difficulty of clipping aneurysm of the anterior communicating artery (AcomA) depends on the size, direction, positional relationship with the parent artery, and height from the anterior frontal base. Cases of clipping unruptured AcomA aneurysm through pterional approach were analyzed to investigate the importance of the horizontal distance from the base of the anterior clinoid process. METHODS: Twenty-six consecutive unruptured AcomA aneurysms were treated by clipping through pterional approach in 10 males and 11 females aged 37-77 years (mean 61...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28870428/retro-and-orthonasal-olfactory-function-in-relation-to-olfactory-bulb-volume-in-patients-with-hypogonadotrophic-hypogonadism
#4
Murat Salihoglu, Onuralp Kurt, Seyid Ahmet Ay, Kamil Baskoy, Aytug Altundag, Muzaffer Saglam, Ferhat Deniz, Hakan Tekeli, Arif Yonem, Thomas Hummel
INTRODUCTION: Idiopathic hypogonadotrophic hypogonadism (IHH) with an olfactory deficit is defined as Kallmann syndrome (KS) and is distinct from normosmic IHH. OBJECTIVE: Because olfactory perception not only consists of orthonasally gained impressions but also involves retronasal olfactory function, in this study we decided to comprehensively evaluate both retronasal and orthonasal olfaction in patients with IHH. METHODS: This case-control study included 31 controls and 45 IHH patients...
August 24, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28859708/the-effect-of-olfactory-training-on-the-odor-threshold-in-patients-with-traumatic-anosmia
#5
Rong-San Jiang, Chih-Wen Twu, Kai-Li Liang
BACKGROUND: Olfactory training is a novel intervention that has been used to treat olfactory dysfunction. This study attempted to investigate the effect of olfactory training in patients with traumatic anosmia. METHODS: Patients with a clear history of anosmia after experiencing a head injury and whose phenyl ethyl alcohol (PEA) odor detection thresholds were -1 after steroid and zinc treatment were included. The patients were randomly divided into two groups, with patients in one group given a bottle of PEA and those in another group given a bottle of mineral oil for 3-month olfactory training...
September 1, 2017: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28858133/kallmann-syndrome-with-a-tyr113his-prokr2-mutation
#6
Jeong-Ha Ha, Sara Lee, Youngmoon Kim, Ji In Moon, Jongkwon Seo, Ja-Hyun Jang, Eun-Hae Cho, Jung Min Kim, Byoung Doo Rhee, Kyung Soo Ko, Soo Jin Yoo, Jong Chul Won
RATIONAL: Kallmann syndrome (KS) is a genetic gonadotropin-releasing hormone deficiency associated with hyposmia or anosmia and characterized by various modes of inheritance. PATIENT CONCERNS: A 16-year-old male did not reach puberty and was associated with hypogonadotropic hypogonadism and anosmia. His magnetic resonance imaging of brain revealed the absence of the olfactory bulb. DIAGNOSIS: His karyotype was 46 XY. Sanger sequencing of the KAL1 gene revealed no mutations...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28851985/anosmia-impairs-homing-orientation-but-not-foraging-behaviour-in-free-ranging-shearwaters
#7
O Padget, G Dell'Ariccia, A Gagliardo, J González-Solís, T Guilford
Shearwaters deprived of their olfactory sense before being displaced to distant sites have impaired homing ability but it is unknown what the role of olfaction is when birds navigate freely without their sense of smell. Furthermore, treatments used to induce anosmia and to disrupt magneto-reception in displacement experiments might influence non-specific factors not directly related to navigation and, as a consequence, the results of displacement experiments can have multiple interpretations. To address this, we GPS-tracked the free-ranging foraging trips of incubating Scopoli's shearwaters within the Mediterranean Sea...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28831590/limitations-of-the-endonasal-endoscopic-approach-in-treating-olfactory-groove-meningiomas-a-systematic-review
#8
REVIEW
Sathwik Raviraj Shetty, Armando S Ruiz-Treviño, Sacit Bulent Omay, Joao Paulo Almeida, Buqing Liang, Yu-Ning Chen, Harminder Singh, Theodore H Schwartz
OBJECTIVE: To review current management strategies for olfactory groove meningioma (OGM)s and the recent literature comparing endoscopic endonasal (EEA) with traditional transcranial (TCA) approaches. METHODS: A PubMed search of the recent literature (2011-2016) was performed to examine outcomes following EEA and TCA for OGM. The extent of resection, visual outcome, postoperative complications and recurrence rates were analyzed using percentages and proportions, the Fischer exact test and the Student's t-test using Graphpad PRISM 7...
August 22, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28827465/clinical-reasoning-a-57-year-old-man-with-unilateral-anosmia-papilledema-and-meningismus
#9
Michael J Bradshaw, Karen C Bloch, L Taylor Davis, Laura D Craig-Owens, Kim Ely, Reid Longmuir
No abstract text is available yet for this article.
August 22, 2017: Neurology
https://www.readbyqxmd.com/read/28816545/role-of-diffusion-tensor-imaging-in-the-diagnosis-and-management-of-post-traumatic-anosmia
#10
Lilla Bonanno, Silvia Marino, Simona De Salvo, Rosella Ciurleo, Antonio Costa, Daniele Bruschetta, Demetrio Milardi, Galletti Francesco, Placido Bramanti, Fabrizia Caminiti
INTRODUCTION: Anosmia is a possible complication of Traumatic Brain Injury (TBI). Psychometric and electrophysiological methods of olfaction measure and Magnetic Resonance Imaging (MRI) are the tools to evaluate the post-traumatic olfactory loss. Diffusion Tensor Imaging (DTI) provides useful data for a better understanding of etiopathogenesis TBI-related anosmia, in particular the loss of neural connections and their eventual recovery over time. MATERIALS AND METHODS: This study describes a case of TBI-related anosmia...
August 17, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28805574/nonmotor-symptoms-in-vascular-and-other-secondary-parkinsonism
#11
Oleg S Levin, Achcha Sh Chimagomedova, Natalia A Skripkina, Elena A Lyashenko, Olga V Babkina
Vascular parkinsonism (VP) is a relatively frequent variant of secondary parkinsonism caused by ischemic or hemorrhagic lesions of basal ganglia, midbrain, or their links with frontal cortex. According to different investigations, various forms of cerebrovascular disease cause 1%-15% of parkinsonism cases. Nonmotor symptoms are frequently found in VP and may negatively influence on quality of life. However, nonmotor symptoms such as hallucinations, orthostatic hypotension, REM-sleep behavior disorder, and anosmia are rarely revealed in VP, which may be noted to another diagnosis or mixed pathology...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805567/nutrition-and-nonmotor-symptoms-of-parkinson-s-disease
#12
Laurie K Mischley
To date, no guidelines exist for the screening, evaluation, and management of nutritional status in PD. Dozens of studies demonstrate an association between diet in adulthood with subsequent risk of developing PD. Individuals with PD are at increased risk of malnutrition due to the increased metabolic demands and disease pathophysiology. Risk of malnutrition is further complicated by anosmia, swallowing difficulties, constipation, and drug-nutrient interactions. An emerging body of evidence suggests that the intestinal tract is affected early in the disease, creating therapeutic opportunities for early intervention...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28802932/anosmia-and-ageusia-in-parkinson-s-disease
#13
Arjun Tarakad, Joseph Jankovic
Anosmia, the loss of sense of smell, is a common nonmotor feature of Parkinson's disease (PD). Ageusia, the loss of sense of taste, is additionally an underappreciated nonmotor feature of PD. The olfactory tract is involved early in PD as indicated by frequent occurrence of hyposmia or anosmia years or decades before motor symptoms and by autopsy studies showing early synuclein pathology in the olfactory tract and anterior olfactory nucleus even in the early stages of PD. Testing for olfaction consists of evaluation of olfactory thresholds, smell identification and discrimination, and olfactory memory...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28802362/kallmann-syndrome-in-pediatric-otorhinolaryngology-practice-case-report-and-literature-review
#14
Karolina Dżaman, Karolina Zborowska-Piskadło, Mirosława Pietniczka-Załęska, Ireneusz Kantor
BACKGROUND: Kallmann syndrome (KS) is an isolated form of hypogonadotrophic hypogonadism (HH) in combination with a defect in olfactory function. The diagnosis of KS before maturation is often difficult to make due to the broad spectrum of presentation and genetic heterogeneities. ENT examination including smell test is essential for proper diagnosis of olfactory disturbances and non olfactory abnormalities in craniofacial region which may also be existent in KS. CASE: A 17-year-old girl admitted to ENT Department because of the olfactory sense disturbances since two years...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28797983/rationalisation-of-the-irrational-neuropathological-basis-of-hypothyroidism-olfaction-disorders-paradox-experimental-study
#15
Nazan Aydin, Leyla Ramazanoglu, Mehmet Resid Onen, Ilhan Yilmaz, Mehmet Dumlu Aydin, Konca Altinkaynak, Muhammet Calik
OBJECTIVE: Hypothyroidism is defined as an underactive thyroid gland and one of the reasons for inadequate stimulation of thyroid is dysfunction of the hormone regulating brain centers. Olfaction disorders have been considered as a problem in hypothyroidism. It has been hypothesised that olfaction disorders reduce olfactory stimulation and diminished olfactory stimulus may trigger hypothyroidism. In this study an examination was made of the thyroid hormone levels, histological features of thyroid glands and vagal nerve network degradation in an experimental animal model of olfactory bulbectomy (OBX)...
August 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28767470/loss-of-smell-and-taste-after-general-anesthesia-a-case-report
#16
Jason Joe Baker, Stina Öberg, Jacob Rosenberg
This case report describes a patient, who lost the ability to smell and taste after receiving a propofol-based general anesthesia for a laparoscopic inguinal hernia repair. Immediately after the procedure, the patient had anosmia (loss of smell), ageusia (loss of taste), and light dysphagia. Assessment by an otorhinolaryngologist and the results of a magnetic resonance imaging could not clarify the pathology behind these symptoms. Although there are several plausible explanations for the patient's anosmia and ageusia (eg, cerebral infarcts, nerve damage, chronic sinusitis), the most likely explanation is an uncommon adverse drug reaction to the anesthetic agents used during the procedure...
August 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28743599/cognitive-behavioral-therapy-cbt-for-preventing-alzheimer-s-disease
#17
REVIEW
Larry D Reid, Faith E Avens, Alicia A Walf
This review provides the rationale for implementing cognitive behavioral therapy (CBT) for the prevention of Alzheimer's disease (AD). There are known risk factors associated with the development of AD, some of which may be ameliorated with CBT. We posit that treating the risk factors of inactivity, poor diet, hyposmia and anosmia, sleep disorders and lack of regularly engaged challenging cognitive activity will modify the physiology of the brain sufficiently to avoid the accumulation of excess proteins, including amyloid beta, causal events in the development of AD...
September 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28716176/systematic-review-of-patient-reported-outcomes-after-revision-endoscopic-sinus-surgery
#18
Shashi Prasad, Eric Fong, Eng H Ooi
BACKGROUND: Revision endoscopic sinus surgery (RESS) may be required for partially controlled or uncontrolled chronic rhinosinusitis. Studies that reported technical success, e.g., sinus ostia patency after RESS, do not address whether the patient's symptoms and quality of life (QOL) improve after surgery. However, patient-reported outcome measures (PROM) are useful to assess the impact of sinus surgery on a patient's symptoms and QOL. OBJECTIVE: This systematic review was undertaken to evaluate the impact of RESS on PROMs...
July 1, 2017: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28667919/a-rare-case-report-of-bilateral-choanal-atresia-in-an-adult
#19
Said Anajar, Jawad Hassnaoui, Sami Rouadi, Reda Abada, Mohammed Roubal, Mohammed Mahtar
INTRODUCTION: Adult choanal atresia is a rare congenital malformation of the nasal cavity characterized by the complete obliteration of the posterior choanae, only ninth cases are reported in the literature, we present in our observation the tenth case of adult bilateral choanal atresia. PRESENTATION OF CASE: A 18-year-old man presented at our department with complaints of nasal obstruction, nasal discharge, snoring, anosmia, and mouth breathing since childhood...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28656349/structural-determinants-of-a-conserved-enantiomer-selective-carvone-binding-pocket-in-the-human-odorant-receptor-or1a1
#20
Christiane Geithe, Jonas Protze, Franziska Kreuchwig, Gerd Krause, Dietmar Krautwurst
Chirality is a common phenomenon within odorants. Most pairs of enantiomers show only moderate differences in odor quality. One example for enantiomers that are easily discriminated by their odor quality is the carvones: humans significantly distinguish between the spearmint-like (R)-(-)-carvone and caraway-like (S)-(+)-carvone enantiomers. Moreover, for the (R)-(-)-carvone, an anosmia is observed in about 8% of the population, suggesting enantioselective odorant receptors (ORs). With only about 15% de-orphaned human ORs, the lack of OR crystal structures, and few comprehensive studies combining in silico and experimental approaches to elucidate structure-function relations of ORs, knowledge on cognate odorant/OR interactions is still sparse...
June 27, 2017: Cellular and Molecular Life Sciences: CMLS
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