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The Canadian Journal of Neurological... Jul 2017
Topics: Head Impulse Test; Humans; Male; Middle Aged; Nystagmus, Pathologic; Platybasia; Vertigo
PubMed: 28767033
DOI: 10.1017/cjn.2016.453 -
World Neurosurgery Dec 2019The flexion of the skull base (basal angle [BA]) is the inclination between the anterior fossae and the basilar ramp of the occipital and sphenoid bones. An increased... (Review)
Review
BACKGROUND
The flexion of the skull base (basal angle [BA]) is the inclination between the anterior fossae and the basilar ramp of the occipital and sphenoid bones. An increased BA, termed platybasia, is usually associated with basilar invagination. BA reference values in the magnetic resonance imaging (MRI) era and the diagnosis of platybasia are of clinical importance. The transnasal approach has been the surgical technique of choice to remove the odontoid process in cases of ventral brainstem compression in patients with platybasia. The knowledge of normal BA values has been influenced by technological image acquisitions. The aim of this study was to determine the normal BA values in normal subjects in the MRI era.
METHODS
For the determination of normal BA values, the literature reporting these values in normal individuals was reviewed and a meta-analysis of pertinent studies was performed.
RESULTS
A total of 8 articles were included in this study, evaluating a total of 667 individuals. A summary measure of the results was obtained. The data obtained in this analysis provided a final basal angle value of 116.5 degrees (95% confidence interval, 104.39-128.7). The normal basal angle ranges between 104 and 129 degrees.
CONCLUSION
Platybasia can be defined as a value >129 from the basal angle.
Topics: Humans; Magnetic Resonance Imaging; Neurosurgical Procedures; Platybasia; Reference Values; Skull Base; Skull Base Neoplasms
PubMed: 31541760
DOI: 10.1016/j.wneu.2019.09.056 -
Archives of Ophthalmology (Chicago,... Dec 1968
Topics: Adolescent; Adult; Arnold-Chiari Malformation; Brain Diseases; Brain Stem; Cerebral Ventriculography; Female; Gait; Humans; Male; Middle Aged; Nystagmus, Pathologic; Platybasia; Skull; Vertigo; Vision Disorders
PubMed: 5303364
DOI: 10.1001/archopht.1968.00980050759015 -
Journal of Neurology, Neurosurgery, and... Feb 1955
Topics: Occipital Bone; Platybasia
PubMed: 14368325
DOI: 10.1136/jnnp.18.1.58 -
Journal of Neurosurgery Sep 2002
Topics: Cervical Vertebrae; Decompression, Surgical; Female; Humans; Male; Middle Aged; Odontoid Process; Platybasia; Postoperative Complications; Reoperation; Spinal Fusion; Weight-Bearing
PubMed: 12296696
DOI: 10.3171/spi.2002.97.2.0272 -
Journal of the South Carolina Medical... Apr 1949
Topics: Axis, Cervical Vertebra; Cervical Atlas; Humans; Intracranial Pressure; Occipital Bone; Platybasia
PubMed: 18126844
DOI: No ID Found -
Neurosurgery Clinics of North America Jul 2007There are numerous congenital anomalies of the cervical spine. They can be simple and clinically inconsequential to complex with serious neurologic and structural... (Review)
Review
There are numerous congenital anomalies of the cervical spine. They can be simple and clinically inconsequential to complex with serious neurologic and structural implications. They can occur in isolation or as one of several maldeveloped organs in the patients. Many are discovered incidentally. The more common anomalies seen by pediatric spine surgeons include defects of the anterior or posterior arches of C1, occipital assimilation of the atlas, basilar invagination or impression, os odontoideum, and Klippel-Feil syndrome. Management begins with a detailed history, physical examination, and imaging studies. In general, those lesions that are causing or have caused neurologic injury, chronic pain, or spinal deformity or place the patient at high risk for developing these require treatment.
Topics: Achondroplasia; Cervical Vertebrae; Humans; Klippel-Feil Syndrome; Neural Tube Defects; Platybasia
PubMed: 17678749
DOI: 10.1016/j.nec.2007.04.005 -
Clinical Rheumatology Mar 2024
Topics: Humans; Platybasia; Hypoglossal Nerve Diseases; Arthritis, Rheumatoid
PubMed: 38170293
DOI: 10.1007/s10067-023-06863-7 -
Magyar Radiologia May 1956
Topics: Atlanto-Occipital Joint; Congenital Abnormalities; Humans; Platybasia
PubMed: 13347249
DOI: No ID Found -
Radiology Oct 1953
Topics: Adenocarcinoma; Disease; Humans; Osteitis Deformans; Platybasia; Skull
PubMed: 13100676
DOI: 10.1148/61.4.639