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styloid apparatus

José Francisco Rodríguez-Vázquez, Samuel Verdugo-López, Hiroshi Abe, Gen Murakami
Currently, theories based on acquired calcification of the stylohyoid ligament are believed to be a pathogenesis of syndromes associated with the hyoid apparatus (HA) and its variations. We studied the development of the HA from Reichert´s cartilage using serial sections of 25 human embryos and 45 fetuses. We ensured a fact that, at the initial stage, the HA appeared as two independent cartilage segments, that is, the cranial or styloid segment and the caudal or hyoid segment of Reichert's cartilage, those are connected by a mesenchymal structure...
August 2015: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
Bart N Green, Lcdr Kristin M Browske, Capt Michael D Rosenthal
OBJECTIVE: The purpose of this paper is to present a case of a patient with neck pain, tinnitus, and headache in the setting of bilateral elongated styloid processes (ESP) and calcified stylohyoid ligaments (CSL), how knowledge of this anatomical variation and symptomatic presentation affected the rehabilitation management plan for this patient, and to discuss the potential relevance of ESPs and CSLs to carotid artery dissection. CLINICAL FEATURES: A 29-year-old male military helicopter mechanic presented for chiropractic care for chronic pain in the right side of his neck and upper back, tinnitus, and dizziness with a past history of right side parietal headaches and tonsillitis...
June 2014: Journal of Chiropractic Medicine
Hubert Hardy, Benjamin Guichard, Mickael Eliezer, Olivier Choussy, Jean-Marc Péron, Olivier Trost
Anatomical variations of the stylohyoid apparatus are frequent. Two types can occur: an elongation of the stylohyoid ligament, from a long styloid process to a complete ossified structure connecting the skull base to the lesser horn of the hyoid bone, or the existence of supernumerary bones in the stylohyoid fibrous matrix, which sometimes resembles phalanges. These variations are in the majority of cases bilateral and symmetrical. The authors report the case of a 43-year-old male patient who presented with an unusual unilateral complete ossification of the stylohyoid apparatus, associated with vertebral and laryngeal calcifications...
November 2014: Surgical and Radiologic Anatomy: SRA
Christopher J Dy, Eugene Jang, Samuel A Taylor, Kathleen N Meyers, Scott W Wolfe
PURPOSE: Shift of the distal fragment of a distal radius fracture (DRF) in the coronal plane (coronal shift) may compromise the contributions of the distal oblique bundle (DOB) of the interosseous membrane to distal radioulnar joint (DRUJ) stability. The purpose of the study was to test our hypothesis that coronal shift of the distal fragment would increase dorsal-volar DRUJ displacement in response to applied load. METHODS: A distal radius osteotomy was performed proximal to the sigmoid notch base and the ulnar styloid was cut (to simulate triangular fibrocartilage complex detachment) in 10 cadaveric specimens...
July 2014: Journal of Hand Surgery
Shivani Jain, Ashok Bansal, Samrity Paul, Deepti Vashisht Prashar
This is a case report of Eagle's syndrome due to osseous metaplasia of the stylohyoid apparatus treated conservatively by injection of a local anesthetic - steroid combination. The incidence, etiopathogenesis, classification, clinical picture and various approaches to treatment of ossified stylohyoid ligament associated with Eagle's syndrome have been discussed. Anterolateral glossodynia, which is a previously unreported finding in Eagle's syndrome, and its possible etiology, has also been discussed.
January 2012: Annals of Maxillofacial Surgery
Félix Jesús De Paz, Cristina Rueda, Mercedes Barbosa, María García, Juan Francisco Pastor
The hyoid apparatus is made up of three osteocartilaginous elements that go from the base of the cranium to the hyoid bone; the portions, cranially to caudally, are as follow: stylohyal, ceratohyal, and apohyal. Fusion and ossification of these three components will bring about somewhat long stylohyoid processes, whereas the stylohyal portion is the one that gives rise to the authentic stylohyoid process. The variability of the hyoid apparatus may imply associated compressive pathologies, for which an etiological diagnosis is important...
May 2012: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
A Koivumäki, M Marinescu-Gava, J Järnstedt, G K Sándor, J Wolff
Eagle syndrome is characterized by secondary calcification and elongation of the styloid process. Eagle syndrome is often associated with sharp, intermittent pain along the path of the glossopharyngeal nerve located in the hypopharynx and at the base of the tongue. In some cases, the stylohyoid apparatus can compress the internal and/or the external carotid arteries and their perivascular sympathetic fibres, resulting in a persistent pain radiating throughout the carotid territory. The pathogenesis of the syndrome is not understood...
March 2012: International Journal of Oral and Maxillofacial Surgery
Massimo Politi, Corrado Toro, Giulia Tenani
Patients with pharyngodynia and neck pain symptoms can lead to an extensive differential diagnosis. Eagle's syndrome must be taken in account. Eagle defined "stylalgia" as an autonomous entity related to abnormal length of the styloid process or to mineralization of the stylohyoid ligament complex. The stylohyoid complex derives from Reichert's cartilage of the second branchial arch. The styloyd process is an elongated conical projection of the temporal bone that lies anteriorly to the mastoid process...
2009: International Journal of Dentistry
Yusuf Izci, Roham Moftakhar, Mark Pyle, Mustafa K Başkaya
OBJECTIVE: Access to the high cervical internal carotid artery (ICA) is technically challenging for the treatment of lesions in and around this region. The aims of this study were to analyze the efficacy of approaching the high cervical ICA through the retromandibular fossa and to compare preauricular and postauricular incisions. In addition, the relevant neural and vascular structures of this region are demonstrated in cadaveric dissections. METHODS: The retromandibular fossa approach was performed in four arterial and venous latex-injected cadaveric heads and necks (eight sides) via preauricular and postauricular incisions...
May 2008: Neurosurgery
Samuel M Felton, Terry A Gaige, Timothy G Reese, Van J Wedeen, Richard J Gilbert
The tongue is an intricately configured muscular organ that undergoes a series of rapid shape changes intended to first configure and then transport the bolus from the oral cavity to the pharynx during swallowing. To assess the complex array of mechanical events occurring during the propulsive phase of swallowing, we employed tongue pressure-gated phase-contrast MRI to represent the tissue's local strain rate vectors. Validation of the capacity of phase-contrast MRI to represent local compressive and expansive strain rate was obtained by assessing deformation patterns induced by a synchronized mechanical plunger apparatus in a gelatinous material phantom...
July 2007: Journal of Applied Physiology
Federica Beretta, Salah A Hemida, Norberto Andaluz, Mario Zuccarello, Jeffrey T Keller
OBJECTIVE: Several studies have reported on approaches to increase exposure of the distal cervical internal carotid artery (ICA), but these studies have neither systematically addressed the anatomic aspects nor quantified the additional exposure of each maneuver. We describe surgical steps to expose the ICA region, quantify the additional exposure of each operative step, and discuss ways to minimize surgical morbidity. METHODS: The ICA was exposed in 10 formalin-fixed cadaveric heads using the following four steps: 1) anterior sternocleidomastoid approach, 2) retroparotid dissection and division of the digastric muscle, 3) section of the styloid apparatus, and 4) mandibulotomy...
July 2006: Neurosurgery
No abstract text is available yet for this article.
April 15, 1950: Revista de la Asociación Médica Argentina
Z Unlu, S Tarhan, K Gunduz, C Goktan
OBJECTIVE: Stylohyoid apparatus might be an anatomic region in the cervical spine involved by enthesopathy. The aim of this study was to assess the elongation and/or ossification at the stylohyoid apparatus in the degenerative or inflammatory diseases such as ankylosing spondylitis (AS), psoriatic arthropathy (PsA) and cervical spondyloarthrosis (CS) in which cervical spine involvement can be seen. METHODS: Twenty-eight patients with AS, 25 patients with PsA, 31 patients with CS and 50 controls who did not have any complaints or symptoms related with elongated styloid process (SP) were included in the study...
September 2002: Clinical and Experimental Rheumatology
Yuji Nakamaru, Satoshi Fukuda, Shigenori Miyashita, Masami Ohashi
OBJECTIVE: To examine whether the styloid process can be imaged by three-dimensional computer tomography reconstruction (3-DCT) distinctly enough to be used for diagnosis, and whether the image findings are explanatory of the symptoms. METHODS: We performed 3-DCT in four patients suspected to have elongated styloid process in our hospital. The apparatus we used was X-vigor (Toshiba), and the processing software was X-tension; the slicing thickness was 1.0 mm and the shifting speed of CT table was 1...
January 2002: Auris, Nasus, Larynx
C E Dunning, C S Lindsay, R T Bicknell, S D Patterson, J A Johnson, G J King
External fixation is commonly used in the treatment of distal radius fractures. In this in vitro study, we investigated changes in fracture stability when using supplemental radial styloid pinning in combination with external fixation. Eight previously frozen cadaveric upper extremities were mounted in a computer-controlled wrist-loading apparatus. This device was used to generate finger and forearm motions through loading relevant tendons. An unstable extra-articular distal radius fracture was simulated by removing a dorsal wedge from the distal radius metaphysis...
September 1999: Journal of Hand Surgery
W Künzel, A Probst
The anatomy of the carpal joint of the cheetah (Acinonyx jubatus) was examined in seven specimens using dissection and corrosion casts as well as radiography, and compared to well-known data of the domestic cat (Felis catus). It was found that in the cheetah, as in the domestic cat, the intermedioradial, ulnar and accessory carpal bones, as well as the first, second, third and fourth carpal bones and the sesamoid bone of the abductor pollicis longus muscle, develop in a regular manner. The bones had a similar shape and the ligamentous apparatus was comparable, the most striking differences being the connection of all compartments of the joint cavity and the mediocarpal joint, working as a screw joint...
July 1999: Anatomia, Histologia, Embryologia
R Vandersluis, R S Richards, J H Roth
OBJECTIVE: To assess the risk of soft-tissue injury during percutaneous placement of external fixation pins in the proximal radius. DESIGN: An anatomic study with embalmed cadaver limbs. SETTING: Hand and upper limb centre at a university-affiliated hospital. INTERVENTIONS: Two 4-mm Hoffman half pins were percutaneously placed along the dorsoradial ridge of the radius, four finger breadths proximal to the radial styloid process...
December 1993: Canadian Journal of Surgery. Journal Canadien de Chirurgie
N Kamon
The need for standardization and validation of quantitative tests for vibratory sensitivity has been increasingly recognized. Conventional vibrometers have been of limited use for the assessment of vibratory perception threshold (VPT) due to wide intraindividual variations. This study describes the determination of VPT for the medial malleolus (MM), the styloid process of the radius (SPR), and the pulp of the index finger (PIF) in normal subjects, using a new vibrometer, the TM-31A. This apparatus expresses results in terms of actual vibration amplitude and has a feedback mechanism that avoids damping of the stimulator in tissue...
September 1994: Journal of Occupational Medicine.: Official Publication of the Industrial Medical Association
A J Silver, M E Mawad, S K Hilal, P Sane, S R Ganti
The carotid space, parapharyngeal space, and paraspinal space are described. The carotid space is shown on computed tomography (CT) to be posterior to the parapharyngeal space and separated from it by the styloid apparatus. The paraspinal space is posterior to the carotid space and separated from it by the longus and anterior scalene muscles.
March 1984: Radiology
S J McCorkell
Fracture of an elongated styloid process or ossified stylohyoid ligament is uncommon. Neck or throat pain, decreased mobility, hoarseness, and mass in the neck are signs and symptoms of fracture. The inciting trauma may be as mild as yawning but more often blunt trauma of a serious nature, such as motor vehicle accident, is the cause. The diagnosis may be missed because of difficulty imaging the stylohyoid apparatus. Two cases are presented that demonstrate the variability of symptoms and trauma. Previous reports of similar injuries and selection of radiographic examinations, including computed tomography, are discussed...
October 1985: Journal of Trauma
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