Lab exam 2 - bony markings + joints + muscles bs

Question 1

Lateral atlantoaxial joint - type and articulation

Answer 1

Plane joint - between inferior facets of atlas and
superior facets of axis.

Question 2

Medial atlantoaxial joint - type and articulation

Answer 2

Pivot joint - between the dens and anterior arch and
transverse ligament of atlas

Question 3

Platysma: origin, insertion and action

Answer 3

o: fascia skin - infra + supra clavicular origin
i: lower border mandible and moduloous and orbicularis
a: depresses mandible and angle of mouty

Question 4

Splenius Capitis: origin, inserstion and action

Answer 4

o: Spinous process of c7 - t3, medial ligament
i: lateral superior medial line of occipital bone, mastoid process of temporal bone
a: bilateral (extension of head + neck) and unilateral contraction (rotation of head and lateral flexion)

Question 5

Joints of the region - list them all

Answer 5

intervertebral, zygapopysial, costovertebral, costotransverse, sternocostal, manubriosternal