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Levator muscle

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https://www.readbyqxmd.com/read/29788690/upper-eyelid-platinum-weight-placement-for-the-treatment-of-paralytic-lagophthalmos-a-new-plane-between-the-inner-septum-and-the-levator-aponeurosis
#1
Tae Suk Oh, Kyunghyun Min, Sin Young Song, Jong Woo Choi, Kyung Suk Koh
BACKGROUND: The most common surgical treatment for paralytic lagophthalmos is the placement of a weight implant in the upper eyelid; however, this technique confers the risks of implant visibility, implant extrusion, and entropion. In this study, we present a new technique of placing platinum weight implants between the levator aponeurosis and inner septum to decrease such complications. METHODS: A total of 37 patients with paralytic lagophthalmos were treated between March 2014 and January 2017 with platinum weight placement (mean follow-up, 520...
May 2018: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/29786037/preliminary-outcome-of-individualized-abdominoperineal-excision-for-locally-advanced-low-rectal-cancer
#2
Yi Zheng, Jia-Gang Han, Zhen-Jun Wang, Zhi-Gang Gao, Guang-Hui Wei, Zhi-Wei Zhai, Bao-Cheng Zhao
Background: The introduction of individualized abdominoperineal excision (APE) may minimize operative trauma and reduce the rate of complications. The purpose of this study was to evaluate the safety and efficacy of individualized APE for low rectal cancer. Methods: Fifty-six patients who underwent individualized APE from June 2011 to June 2015 were evaluated retrospectively in Beijing Chaoyang Hospital, Capital Medical University. The main outcome measures were circumferential resection margin (CRM) involvement, intraoperative perforation, postoperative complications, and local recurrence...
June 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29782004/levator-auris-longus-preparation-for-examination-of-mammalian-neuromuscular-transmission-under-voltage-clamp-conditions
#3
Steven R A Burke, Eric J Reed, Shannon H Romer, Andrew A Voss
This protocol describes a technique to record synaptic transmission from the neuromuscular junction under current-clamp and voltage-clamp conditions. An ex vivo preparation of the levator auris longus (LAL) is used because it is a thin muscle that provides easy visualization of the neuromuscular junction for microelectrode impalement at the motor endplate. This method allows for the recording of spontaneous miniature endplate potentials and currents (mEPPs and mEPCs), nerve-evoked endplate potentials and currents (EPPs and EPCs), as well as the membrane properties of the motor endplate...
May 5, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781570/effect-of-motor-based-speech-intervention-on-articulatory-placement-in-the-treatment-of-a-posterior-nasal-fricative-a-preliminary-mri-study-on-a-single-subject
#4
Kazlin N Mason, Eshan Pua, Jamie L Perry
BACKGROUND: Posterior nasal fricatives are a learned compensatory articulation error and commonly substituted for oral fricatives. Treatment of such articulation errors requires the modification or teaching of skilled movements. A motor-based approach is designed to teach the complex motor skill movement sequences required in the production of sounds. Although motor learning research is well established, little has been done to determine how the approach changes the underlying physiology of articulatory movements...
May 21, 2018: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/29779185/predictive-role-of-measurement-of-pelvic-floor-muscle-thickness-with-static-mri-in-stress-and-mixed-urinary-incontinence
#5
Levent Yaşar, Serpil Ortakuz Telci, Keziban Doğan, Eyüp Kaya, Murat Ekin
INTRODUCTION AND HYPOTHESIS: To investigate the role of measuring the thickness of pelvic floor muscles with static MRI in the physiopathology of urinary incontinence in women with stress and mixed types of urinary incontinence diagnosed with urodynamic studies. METHODS: A retrospective clinical study was designed in collaboration with the radiology department. We recruited only patients who had undergone static pelvic MRI to determine the etiology of pelvic pain and exclude gynecologic disorders...
May 19, 2018: International Urogynecology Journal
https://www.readbyqxmd.com/read/29771806/supine-bottom-up-extralevator-abdominoperineal-excision-with-primary-perineal-approach
#6
Cécile de Chaisemartin, Diane Mège, Jean Michel Durey, Hélène Meillat, Jean Robert Delpero, Bernard Lelong
To improve poor oncological outcomes of conventional abdominoperineal excision (APE), an extralevator abdominoperineal excision has been developed. This technique is associated with a larger pelvic floor defect and needs position changing and flap reconstruction, which increase operating time and morbidity without proof of best oncological results. Based on the recent development of transanal approaches for retrograde transanal mesorectal excision, we describe a novel approach for APE by a primary perineal dissection...
May 15, 2018: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/29761534/co-contraction-behavior-of-masticatory-and-neck-muscles-during-tooth-grinding
#7
Nikolaos Nikitas Giannakopoulos, Hans-Jürgen Schindler, Daniel Hellmann
OBJECTIVE: The objective of this study was to analyze the co-contraction behavior of jaw and neck muscles during force-controlled experimental grinding in the supine position. METHODS: Twelve symptom-free subjects were enrolled in the experiment study. Electromyographic (EMG) activity of semispinalis capitis, splenius capitis, and levator scapulae muscles was recorded bilaterally with intramuscular fine-wire electrodes, whereas that of sternocleidomastoideus, infrahyoidal, suprahyoidal, masseter, and anterior temporalis muscles were registered with surface electrodes...
May 14, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29757662/a-review-of-the-surgical-management-of-perineal-hernias-in-dogs
#8
Sukhjit Singh Gill, Robert D Barstad
Perineal hernia refers to the failure of the muscular pelvic diaphragm to support the rectal wall, resulting in herniation of pelvic and, occasionally, abdominal viscera into the subcutaneous perineal region. The proposed causes of pelvic diaphragm weakness include tenesmus associated with chronic prostatic disease or constipation, myopathy, rectal abnormalities, and gonadal hormonal imbalances. The most common presentation of perineal hernia in dogs is a unilateral or bilateral nonpainful swelling of the perineum...
May 14, 2018: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/29749657/fundal-pressure-in-second-stage-of-labor-kristeller-maneuver-is-associated-with-higher-risk-of-levator-ani-muscle-avulsion
#9
Aly Youssef, Ginevra Salsi, Ilaria Cataneo, Giuseppina Pacella, Carlotta Azzarone, Maria Chiara Paganotto, Jovana Krsmanovic, Elisa Montaguti, Luisa Cariello, Federica Bellussi, Nicola Rizzo, Gianluigi Pilu
OBJECTIVE: to investigate the association between fundal pressure in the second stage (Kristeller maneuver) and the risk of levator ani muscle (LAM) injury. METHODS: This was a prospective case-control study conducted in our university hospital. We recruited women immediately following their first vaginal delivery. Women who underwent Kristeller maneuver were recruited as cases. For each case, a control (no Kristeller) was recruited matched by BMI, epidural analgesia, second stage duration and birthweight...
May 10, 2018: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29744575/small-incision-levator-resection-for-correction-of-congenital-ptosis-a-prospective-study
#10
Bahram Eshraghi, Hadi Ghadimi
PURPOSE: To determine the rate of success of small-incision levator resection technique for correction of congenital ptosis. METHODS: Patients with congenital ptosis who were candidates for levator resection were enrolled if their levator function was not poor (< 5 mm). Incisions were made on upper eyelid crease with a length of 10-12 mm. After resection of adequate length of levator muscle, two sutures were used to fix it to tarsal plate. Sliding the incision to medial and lateral sides provided a wider field of access to allow the surgeon to place the sutures above nasal and temporal borders of limbus...
May 9, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29742860/essential-anatomy-of-the-anorectum-for-colorectal-surgeons-focused-on-the-gross-anatomy-and-histologic-findings
#11
REVIEW
Jong Min Lee, Nam Kyu Kim
The anorectum is a region with a very complex structure, and surgery for benign or malignant disease of the anorectum is impossible without accurate anatomical knowledge. The conjoined longitudinal muscle consists of smooth muscle from the longitudinal muscle of the rectum and the striate muscle from the levator ani and helps maintain continence; the rectourethralis muscle is connected directly to the conjoined longitudinal muscle at the top of the external anal sphincter. Preserving the rectourethralis muscle without damage to the carvernous nerve or veins passing through it when the abdominoperineal resection is implemented is important...
April 2018: Annals of Coloproctology
https://www.readbyqxmd.com/read/29731323/on-the-variation-in-maternal-birth-canal-in-vivo-viscoelastic-properties-and-their-effect-on-the-predicted-length-of-active-second-stage-and-levator-ani-tears
#12
Paige V Tracy, Shreya Wadhwani, Jourdan Triebwasser, Alan S Wineman, Francisco J Orejuela, Susan M Ramin, John O DeLancey, James A Ashton-Miller
The pubovisceral muscles (PVM) help form the distal maternal birth canal. It is not known why 13% of vaginal deliveries end in PVM tears, so insights are needed to better prevent them because their sequelae can lead to pelvic organ prolapse later in life. In this paper we provide the first quantification of the variation in in vivo viscoelastic properties of the intact distal birth canal in healthy nulliparous women using Fung's Quasilinear Viscoelastic Theory and a secondary analysis of data from a clinical trial of constant force birth canal dilation to 8 cm diameter in the first stage of labor in 26 nullipara...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29727372/the-effect-of-commonly-performed-exercises-on-the-levator-hiatus-area-and-the-length-and-strength-of-pelvic-floor-muscles-in-postpartum-women
#13
Lauren N Siff, Audra J Hill, Samantha J Walters, Ginny Walters, Mark D Walters
OBJECTIVE: The aim oft his study was to compare the effects of 10 common exercises to traditional pelvic floor muscle (PFM) contractions (Kegel) on levator hiatus (LH) area and PFM length and strength. METHODS: This is a cross-sectional study of 15 healthy postpartum women. Ten exercises were studied. These were common variations of leg, core, and back exercises used in yoga, Pilates, strength training, and physical therapy. Each participant performed all 10 exercises at a single visit in 2 examination settings: transperineal ultrasound and perineometry...
May 2, 2018: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/29722624/cross-talk-between-androgen-and-wnt-signaling-potentially-contributes-to-age-related-skeletal-muscle-atrophy-in-rats
#14
Petey W Mumford, Matthew A Romero, Xuansong Mao, C Brooks Mobley, Wesley C Kephart, Cody T Haun, Paul A Roberson, Kaelin C Young, Jeffrey S Martin, Joshua F Yarrow, Darren T Beck, Michael D Roberts
We sought to determine whether age-related gastrocnemius muscle mass loss was associated with parallel decrements in androgen receptor (AR) or select Wnt signaling markers. To test this hypothesis, serum free and total testosterone (TEST) as well as gastrocnemius AR and Wnt signaling markers were analyzed in male Fischer 344 rats that were 3/6/12/18 and 24 months (mo) old (n=9 per group). Free and total TEST were greatest in 6 mo rats, and AR protein and Wnt5 protein levels linearly declined with aging. There were associations between Wnt5 protein levels and relative gastrocnemius mass (r=0...
May 3, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29718238/transection-of-the-nasal-base-muscles-for-the-correction-of-plunging-tip-an-outcome-analysis
#15
Mehmet Bayramiçli, Zeynep Akdeniz Dogan
Background: The plunging-tip deformity has been attributed to the combined actions of nasal base muscles. However, there are no quantitative data in the literature to discuss the effect of muscle transections on the clinical outcome. Objectives: This study was designed to assess the actions of the nasal tip, nasal base, and upper lip in patients with plunging-tip deformity and to compare their preoperative and postoperative activities following multiple myotomies...
April 26, 2018: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29717299/anorectal-gastrointestinal-stromal-tumour-a-case-treated-with-radical-surgery
#16
Arbin Joshi
Gastrointestinal Stromal Tumour involving rectum and anal canal is an extremely rare entity. This is a case report of a 47 years lady presented with fresh rectal bleed associated with rectal pain and foul smelling rectal mucus discharge. On rectal examination, she had a firm mass palpable about 1.5 cm from anal verge. Considering the size of the tumour and its close proximity with cervix and involvement of levator muscles, extralevator abdominal perineal excision of rectum was undertaken with good recovery after surgery...
March 13, 2018: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/29709332/surgical-indication-of-furlow-palatoplasty-to-treat-submucous-cleft-palate
#17
Joon Hyun Kwon, Jeong Woo Lee, Jung Dug Yang, Ho Yun Chung, Byung Chae Cho, Kang Young Choi
This study investigated the effects of Furlow palatoplasty on children with submucous cleft palate (SMCP) and identified surgical indications by comparing SMCP and control patients. Twenty-three SMCP children (average age 28.9 months) who were nonsyndromic and underwent surgery between April 2010 and December 2016 were included. Facial computed tomography (CT) was performed preoperatively and at least 1 year postoperatively after a language test. Facial CT measurements were taken for 140 children aged 0-6 years without deformities (control group)...
March 29, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29707681/hershberger-assays-for-di-2-ethylhexyl-phthalate-and-its-substitute-candidates
#18
Hee-Su Kim, Yong-Pil Cheon, Sung-Ho Lee
In the present study, we employed Hershberger assay to determine possible androgenic or antiandrogenic activities of three di-2-ethylhexyl phthalate (DEHP) substitute candidates. The assay was carried out using immature castrated Sprague-Dawley male rats. After 7 days of the surgery, testosterone propionate (TP, 0.4 mg/kg/day) and test materials (low dose, 40 mg/kg/day; high dose, 400 mg/kg/day) were administered for 10 consecutive days by subcutaneous (s.c.) injection and oral gavage, respectively. Test materials were DEHP, 2-ethylhexyl oleate (IOO), 2-ethylhexyl stearate (IOS) and triethyl 2-acetylcitrate (ATEC)...
March 2018: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/29705893/a-study-of-changes-in-levator-muscle-in-congenital-ptosis
#19
Abhidnya Surve, M C Sharma, Neelam Pushker, M S Bajaj, Rachna Meel, Seema Kashyap
PURPOSE: To study microscopic and ultrastructural changes of levator palpebrae superioris (LPS) muscle in congenital ptosis. METHODS: In this prospective observational study, LPS muscle was studied in 77 eyelids with congenital ptosis; 35-simple congenital ptosis (SCP), 12-Marcus Gunn jaw winking phenomenon (MGJWP), and 30-blepharophimosis epicanthus inversus syndrome (BPES). Light microscopy, enzyme histochemistry, immunohistochemistry and electron microscopy were performed, and results were analyzed...
April 28, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29701566/the-subatlantic-triangle-gateway-to-early-localization-of-the-atlantoaxial-vertebral-artery
#20
Ali Tayebi Meybodi, Sirin Gandhi, Mark C Preul, Michael T Lawton
OBJECTIVE Exposure of the vertebral artery (VA) between C-1 and C-2 vertebrae (atlantoaxial VA) may be necessary in a variety of pathologies of the craniovertebral junction. Current methods to expose this segment of the VA entail sharp dissection of muscles close to the internal jugular vein and the spinal accessory nerve. The present study assesses the technique of exposing the atlantoaxial VA through a newly defined muscular triangle at the craniovertebral junction. METHODS Five cadaveric heads were prepared for surgical simulation in prone position, turned 30°-45° toward the side of exposure...
April 27, 2018: Journal of Neurosurgery. Spine
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