Flashcards in Day 1 Deck (20)
What is the name of the first cervical vertebrae?
What features are lacking at C1?
vertebral body, pedicles, a spinous process and the intervertebral disc
What is thought to represent the pedicle at C1?
the anterior arch
What muscle attaches to the anterior arch of C1?
What ligaments will attach to the anterior arch of C1?
the anterior longitudinal, anterior atlanto-occipital and anterior atlanto-axial ligaments
What is observed on the back of the anterior arch of C1?
the fovea dentis
What joint classifications are observed on the anterior arch of C1?
fibrous (amphiarthrosis) syndesmosis joint and synovial pivot (diarthrosis trochoid) joint
What is the morphology of the superior articular facet of C1?
they are elliptical, closer together in front and often demonstrate elevation subdividing the facet surface into two separate surfaces
What is the orientation of the superior articular facet of C1?
backward, upward, medial (BUM)
What is the joint classification of the atlanto-occipital zygapophysis?
synovial (diarthrosis) ellipsoidal joint
What are the morphological characteristics of the inferior articular facet of C1?
asymmetrical, slightly concave or flattened
What is the orientation of the inferior articular facet of C1?
backward, medial, downward (BMD)
What is the joint classification of the atlanto-axial zygapophysis?
synovial plane (diarthrosis arthrodia) joint
What muscles attach to the lateral mass of C1?
levator scapula, splenius cervicis and rectus capitis anterior
What part of C1 represents the spinous process?
posterior tubercle of the posterior arch
What is the distance from the posterior tubercle of the posterior arch to the skin in each gender?
males: about fifty millimeters; females: about thirty-seven milliters
What attaches to the posterior tubercle of the posterior arch of C1?
rectus capitis posterior minor muscle and ligamentum nuchae
What superior surface modifications of the posterior arch of C1 are present?
groove/sulcus for the vertebral artery and arcuate rim
What attaches to the arcuate rim of C1?
the posterior atlanto-occipital ligament