H. Atypical Thoracic: T1 Flashcards
What joint classifications are identified at the vertebral body of T1?
fibrous (amphiarthrosis) syndesmosis, cartilaginous (amphiarthrosis) symphysis, and synovial plane (diarthrosis arthrodia joint)
the modified synovial saddle (diarthrosis sellar) is only observed as an anatomical variation
How many joints are formed at the vertebral body of T1?
typically 10 (14 If the rib ligaments are included)
Which muscle is attached to the vertebral body of T1?
the longus colli
Which spinal nerve - vertebral notch/incisure combination is present at T1?
C8 spinal nerve - the superior vertebral notch/incisure of T1
T1 spinal nerve - the inferior vertebral notch/incisure of T1
What ligaments support the costotransverse joint of T1?
the inferior costotransverse and lateral costotransverse ligaments
What ligament is absent at the costotransverse joint of T1?
the superior costotransverse ligament
What muscles attach to the transverse process of T1?
longissimus thoracics, longissimus cervicis, longissimus capitis, semispinalis cervicis, semispinalis capitis, multifidis, rotator longus, rotator brevis, intertransversarii, levator costarum brevis
What is the orientation of the superior articular facet of T1?
they face backward, upward, and lateral (BUL)
What is the orientation of the inferior articular facet of T1?
they face forward, downward, and medial (ForMeD)
How many synovial joints are present at T1?
ten
What is the angulation of the spinous process of T1?
the undersurface of the T1 spinous process will be nearly horizontal from the horizontal plane
What is the gender bias associated with T1 as the vertebral prominence?
males (9%) are more likely than females (6%) to demonstrate T1 as the vertebral prominence
What muscles attach to the spinous process of T1?
trapezius, rhomboid minor, serratus posterior, splenius capitis, spinalis thoracis, spinalis cervicis, spinalis capitis, semispinalis thoracis, multifidis, rotator longus, rotator brevis
What joint classifications are present at the T1 vertebra?
fibrous (amphiarthrosis) syndesmosis, cartilaginous (amphiarthrosis) symphysis, and synovial plane (diarthrosis arthrodia)
