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Medial Septum

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https://www.readbyqxmd.com/read/29126760/nuances-in-component-nasal-hump-reduction
#1
Haneen Sadick, Julian M Rowe-Jones, Holger G Gassner
IMPORTANCE: Nasal hump reduction is a frequent manoeuvre in rhinoplasty. Over the last years, composite hump reduction has been advocated in favour of component hump reduction. The latter allows a more controlled and stepwise approach in reducing the nasal dorsum by deprojecting the cartilaginous dorsum separately from the bony dorsum. This approach also preserves the upper lateral cartilages (ULCs) and their mucosa. OBJECTIVE: To analyse the intricacies of the anatomic transition zone between the ULCs, the rhinion and the nasal bones as they pertain to component hump reduction...
October 20, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29124376/an-alternative-rhinoplasty-technique-rotational-spreader-flap-rabbit-flap
#2
Ali Ahmet Sirin, Ibrahim Erdim, Omer Erdur, Alperen Sirin
BACKGROUND: In modern rhinoplasty, septal cartilage is the most commonly used graft material. It is a big challenge if septal cartilage is insufficient. We present an alternative technique named the "rabbit flap," created from the cephalic portion of the lower lateral cartilage to show its effectiveness on nasolabial angle, nasal axis deviation, and nasal dorsal line. METHODS: An alternative flap, called a "rabbit flap," is constituted from the cephalic portion of the lower lateral cartilage (LLC)...
November 9, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29122676/a-six-gene-expression-toolbox-for-the-glands-epithelium-and-chondrocytes-in-the-mouse-nasal-cavity
#3
Yong Wan, Matthew B Rogers, Heather L Szabo-Rogers
The nose is the central feature of the amniote face. In adults, the nose is a structurally and functionally complex organ that consists of bone, cartilage, glands and ducts. In an ongoing expression screen in our lab, we found several novel markers for specific tissues in the nasal region. Here, using in situ hybridization expression experiments, we report that Alx1, Ap-2β, Crispld1, Eya4, Moxd1, and Penk have tissue specific expression during murine nasal development. At E11.5, we observed that Alx1, Ap-2β, Crispld1, and Eya4 are expressed in the medial and lateral nasal prominences...
November 6, 2017: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/29109512/modulating-medial-septal-cholinergic-activity-reduces-medial-entorhinal-theta-frequency-without-affecting-speed-or-grid-coding
#4
Francis Carpenter, Neil Burgess, Caswell Barry
Medial septal inputs to the hippocampal system are crucial for aspects of temporal and spatial processing, such as theta oscillations and grid cell firing. However, the precise contributions of the medial septum's cholinergic neurones to these functions remain unknown. Here, we recorded neuronal firing and local field potentials from the medial entorhinal cortex of freely foraging mice, while modulating the excitability of medial septal cholinergic neurones. Alteration of cholinergic activity produced a reduction in the frequency of theta oscillations, without affecting the slope of the non-linear theta frequency vs running speed relationship observed...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29100991/cue-induced-reinstatement-of-alcohol-seeking-behavior-is-associated-with-increased-camkii-t286-phosphorylation-in-the-reward-pathway-of-mice
#5
Michael C Salling, Christopher J Hodge, Kelly E Psilos, Vallari R Eastman, Sara P Faccidomo, Clyde W Hodge
Cue-induced reinstatement of alcohol-seeking is a hallmark behavioral pathology of addiction. Evidence suggests that reinstatement (e.g., relapse), may be regulated by cell signaling systems that underlie neuroplasticity. A variety of plasticity events require activation of calcium calmodulin-dependent protein kinase II (CaMKII) in components of the reward pathway, such as the nucleus accumbens and amygdala. We sought to determine if cue-induced reinstatement of alcohol-seeking behavior is associated with changes in the activation state (e...
October 31, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29100013/long-range-gabaergic-inputs-regulate-neural-stem-cell-quiescence-and-control-adult-hippocampal-neurogenesis
#6
Hechen Bao, Brent Asrican, Weidong Li, Bin Gu, Zhexing Wen, Szu-Aun Lim, Issac Haniff, Charu Ramakrishnan, Karl Deisseroth, Benjamin Philpot, Juan Song
The quiescence of adult neural stem cells (NSCs) is regulated by local parvalbumin (PV) interneurons within the dentate gyrus (DG). Little is known about how local PV interneurons communicate with distal brain regions to regulate NSCs and hippocampal neurogenesis. Here, we identify GABAergic projection neurons from the medial septum (MS) as the major afferents to dentate PV interneurons. Surprisingly, dentate PV interneurons are depolarized by GABA signaling, which is in sharp contrast to most mature neurons hyperpolarized by GABA...
November 2, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/29060312/predicting-the-stimulation-effectiveness-using-pre-stimulation-neural-states-via-optogenetic-activation-of-the-medial-septum-glutamatergic-neurons-modulating-the-hippocampal-neural-activity
#7
Sang-Eon Park, Nealen G Laxpati, Mark J Connolly, Babak Mahmoudi, Robert E Gross
In this study, we explored the role of pre-stimulation neural states on the effectiveness of optogenetic stimulation. Optogenetic stimulation was applied to the medial septum glutamatergic neurons to modulate the hippocampal neural activity in a rat tetanus toxin seizure model. The hippocampal local field potential was recorded using a multi electrode array in an awake and behaving rat. Optical stimulation with a 465nm light source was applied at 35Hz in a 20 seconds off / 20 seconds on pattern with simultaneous recording from the hippocampus...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29058584/radiographic-characteristics-in-congenital-scoliosis-associated-with-split-cord-malformation-a-retrospective-study-of-266-surgical-cases
#8
Fan Feng, Haining Tan, Xingye Li, Chong Chen, Zheng Li, Jianguo Zhang, Jianxiong Shen
BACKGROUND: Vertebrae, ribs, and spinal cord are anatomically adjacent structures, and their close relationships are clinically important for planning better corrective surgical approach. The objective is to identify the radiographic characteristics in surgical patients with congenital scoliosis (CS) and coexisting split cord malformation (SCM). METHODS: A total of 266 patients with CS and SCM underwent surgical treatment at our hospital between May 2000 and December 2015 was retrospectively identified...
October 23, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29056362/critical-appraisal-of-pathology-transmission-in-the-%C3%AE-synuclein-fibril-model-of-lewy-body-disorders
#9
Negin Nouraei, Daniel M Mason, Kristin M Miner, Michael A Carcella, Tarun N Bhatia, Benjamin K Dumm, Dishaben Soni, David A Johnson, Kelvin C Luk, Rehana K Leak
Lewy body disorders are characterized by the emergence of α-synucleinopathy in many parts of the central and peripheral nervous systems, including in the telencephalon. Dense α-synuclein(+) pathology appears in regio inferior of the hippocampus in both Parkinson's disease and dementia with Lewy bodies and may disturb cognitive function. The preformed α-synuclein fibril model of Parkinson's disease is growing in use, given its potential for seeding the self-propagating spread of α-synucleinopathy throughout the mammalian brain...
October 19, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29044802/differential-and-complementary-roles-of-medial-and-lateral-septum-in-the-orchestration-of-limbic-oscillations-and-signal-integration
#10
Marian Tsanov
Anatomical differences between the medial and lateral septum have associated these nuclei with dissimilar functional roles and behaviors. While the medial septum has been implicated, predominantly, in theta rhythm generation along the septo-hippocampal axis, the lateral septum has mainly been investigated in the context of septo-hypothalamic dialogue. Recent advances suggest that medial and lateral septum are more closely functionally-related than previously appreciated. Here, we explore the hypothesis that the medial septum mediates ascending septo-hippocampal theta propagation, while the lateral septum processes a descending hippocampo-septal and septo-hypothalamic reinforcement signal that mediates navigation during motivated behavior...
October 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29018500/computed-tomography-measurement-of-inferior-turbinate-in-asymptomatic-adult
#11
Mohammad Waheed El-Anwar, Atef A Hamed, Ghada Abdulmonaem, Ismail Elnashar, Inas M Elfiki
Introduction  The inferior turbinate (IT) is the most susceptible turbinate to enlargement causing nasal obstruction. The common belief ascribes most of the enlargement of the IT to mucosal elements. Objective  This study aimed to investigate the detailed computed tomography (CT) measurement of the IT in asymptomatic adult by determining the thickness of both the non-bony (mucosa) and bony parts and their relation to nasal air space in different related areas of the nose. Methods  We included in the study paranasal CT scans of 108 individuals (216 IT) that had no paranasal pathology...
October 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28979196/speed-and-oscillations-medial-septum-integration-of-attention-and-navigation
#12
REVIEW
Marian Tsanov
Several cortical and diencephalic limbic brain regions incorporate neurons that fire in correlation with the speed of whole-body motion, also known as linear velocity. Besides the field mapping and head-directional information, the linear velocity is among the major signals that guide animal's spatial navigation. Large neuronal populations in the same limbic regions oscillate with theta rhythm during spatial navigation or attention episodes; and the frequency of theta also correlates with linear velocity. A functional similarity between these brain areas is that their inactivation impairs the ability to form new spatial memories; whereas an anatomical similarity is that they all receive projections from medial septum-diagonal band of Broca complex...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28966579/medial-septum-modulates-cellular-response-induced-in-hippocampus-on-microinjection-of-cholinergic-agonists-into-hypothalamic-lateral-supramammillary-nucleus
#13
Mohammed Z Ariffin, Chian-Ming Low, Sanjay Khanna
Cholinergic mechanisms in supramammillary nucleus (SuM), especially the lateral SuM (lSuM) modulates septo-hippocampal neural activity. The lSuM, as compared to the contiguous medial SuM (mSuM) has relatively dense projections to hippocampus and cingulate cortex (Cg). In the present study, we have investigated whether the effects of cholinergic activation of SuM on hippocampal and cortical neural activities involve a cooperative interaction with the medial septum (MS). Microinjection of the broad-spectrum cholinergic agonist, carbachol, or the cholinergic-nicotinic receptor agonist, nicotine, into the lSuM and the mSuM in urethane anesthetized rat evoked a similar pattern of hippocampal theta rhythm...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28956150/safe-zones-and-a-technical-guide-for-cerclage-wiring-of-the-femur-a-computed-topographic-angiogram-cta-study
#14
Theerachai Apivatthakakul, P Siripipattanamongkol, Chang-Wug Oh, K Sananpanich, C Phornphutkul
INTRODUCTION: Cerclage wiring for reduction of complex femoral shaft fractures can create iatrogenic vascular injury. OBJECTIVE: To describe the anatomical relation of blood vessels to the femur and develop a technical guide for safe passage of cerclage wire. MATERIALS AND METHODS: CT lower-limb angiographs (CTA) of 80 patients were reviewed and analysed to identify the superficial femoral artery (SFA) and the deep femoral artery (DFA) as well as the relation of those arteries to the femoral cortex...
September 27, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28916821/reduced-basal-forebrain-atrophy-progression-in-a-randomized-donepezil-trial-in-prodromal-alzheimer-s-disease
#15
Enrica Cavedo, Michel J Grothe, Olivier Colliot, Simone Lista, Marie Chupin, Didier Dormont, Marion Houot, Stephane Lehéricy, Stefan Teipel, Bruno Dubois, Harald Hampel
Acetylcholinesterase inhibitors are approved drugs currently used for the treatment of Alzheimer's disease (AD) dementia. Basal forebrain cholinergic system (BFCS) atrophy is reported to precede both entorhinal cortex atrophy and memory impairment in AD, challenging the traditional model of the temporal sequence of topographical pathology associated with AD. We studied the effect of one-year Donepezil treatment on the rate of BFCS atrophy in prodromal AD patients using a double-blind, randomized, placebo-controlled trial of Donepezil (10 mg/day)...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893971/computed-tomographic-assessment-of-equine-maxillary-cheek-teeth-anatomical-relationships-and-paranasal-sinus-volumes
#16
Tiziana Liuti, Richard Reardon, Paddy M Dixon
Disorders affecting the equine maxillary cheek teeth and paranasal sinuses are relatively common, but limited objective information is available on the dimensions and relationships of these structures in horses of different ages. The aims of this study were to assess age-related changes in the positioning and anatomical relationships of the individual maxillary cheek teeth with the infraorbital canal and maxillary septum and the volumes of the individual sinus compartments. CT and gross examination were performed on 60 normal equine cadaver heads that were aged by their dentition...
October 28, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28887226/reconciling-the-different-faces-of-hippocampal-theta-the-role-of-theta-oscillations-in-cognitive-emotional-and-innate-behaviors
#17
REVIEW
Tatiana Korotkova, Alexey Ponomarenko, Caitlin K Monaghan, Steven L Poulter, Francesca Cacucci, Tom Wills, Michael E Hasselmo, Colin Lever
The theta oscillation (5-10Hz) is a prominent behavior-specific brain rhythm. This review summarizes studies showing the multifaceted role of theta rhythm in cognitive functions, including spatial coding, time coding and memory, exploratory locomotion and anxiety-related behaviors. We describe how activity of hippocampal theta rhythm generators - medial septum, nucleus incertus and entorhinal cortex, links theta with specific behaviors. We review evidence for functions of the theta-rhythmic signaling to subcortical targets, including lateral septum...
September 5, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28882491/anatomic-and-high-resolution-computed-tomographic-angiography-study-of-the-lateral-femoral-condyle-flap-implications-for-surgical-dissection
#18
Mohamed Morsy, Yoo Joon Sur, Osman Akdag, Amr Eisa, Tarek A El-Gammal, Nirusha Lachman, Steven L Moran
BACKGROUND: The lateral femoral condyle (LFC) flap is a vascularized bone flap based on the superior lateral genicular artery (SLGA). Harvest technique for this flap has not yet been demonstrated. The purpose of this study was to better delineate the blood supply to the bone and skin of this flap to allow for a safe and effective harvest. MATERIALS AND METHODS: Twenty-three lower extremities were injected with latex or a mixture of latex and barium sulfate. The SLGA was identified and dissected, documenting the course, diameter, anatomical relations, length, and branches...
August 16, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28857999/transnasal-endoscopic-resection-of-a-pleomorphic-adenoma-originate-from-nasal-floor
#19
Yesun Cho, Yul Gyun Kim, Eunhye Shin, Boo-Young Kim
A 81-year-old female presented to our hospital frequent epistaxis. Nasal endoscopy showed a mass obstructing nasal cavity completely and occupying middle meatus. Magnetic resonance imaging was performed, an about 4.8 × 4 × 4.2 cm sized heterogeneous T2 high signal intensity and T1 enhancing mass mainly involving right nasal cavity with invasion of right hard palate with bony destruction. Therefore, the authors planned to do endoscopic mass excision, under general anesthesia for diagnosis and treatment...
October 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28857984/levator-aponeurosis-and-muller-muscle-plication-reinforced-with-levator-sheath-advancement-for-blepharoptosis-correction
#20
Jin Suk Byun, Kun Hwang, Sang Yun Lee, Hak Tae Kim, Kenneth Kim
The authors innovated the levator aponeurosis and Muller muscle plication reinforced with levator sheath advancement (AMPSA) for blepharoptosis correction. The orbital septum was opened 1 mm above its fusion with the levator aponeurosis. The preaponeurotic fat was retracted and the thickened part of the levator sheath was identified. Two plication sutures were made: medial suture at the medial border of the pupil and lateral between the lateral border of the pupil and the lateral limbus. A needle with 6-0 nylon thread first bit the tarsal plate approximately 1 mm below its upper border, then bit the levator aponeurosis and the Muller muscle together at 3 to 6 mm above the upper border of the tarsal plate...
October 2017: Journal of Craniofacial Surgery
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