Does a moose have a spine?
Moose postcranial (behind the head) skeleton have 33 vertebrae. The cranium consists of 38 bones. Moose have 32 permanent teeth.
Which vertebrae looks like a moose?
Lumbar vertebrae
Which cervical vertebrae has a dens that allows for pivoting?
Vertebra, second cervical: The second cervical vertebra is called the axis. It is so-named because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of the second cervical vertebra. The joint between the axis and atlas is a pivot type of joint. It allows the head turn.
Which bone is not considered to be part of the cranium?
Which bone is NOT considered to be part of the cranium? The lacrimal bone is a tiny bone found in the medial portion of the orbit. It is a facial bone, not part of the cranium.
What muscles attach C2?
Attachments:
- attached to the anterior surface of the vertebral body. longus colli.
- attached to transverse processes. levator scapulae. scalenus medius. splenius cervicis.
- attached to spinous processes. semispinalis cervicis. rectus capitis posterior major.
- attached to posterior surface of lamina. multifidus and longissimus.
Why is C2 called axis?
C2 (cervical vertebra): C2 is the symbol for the second cervical vertebra, which is also called the axis. It is so-named because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of the second cervical vertebra.
Does C2 have a lateral mass?
The C2 vertebra consists of a body, paired pedicles, lateral masses (superior articulating facets), odontoid, pars interarticularis, inferior articulating facets, lamina, and bifid spinous process.
Does axis have a body?
The axis is composed of a vertebral body, heavy pedicles, laminae, and transverse processes, which serve as attachment points for muscles. The axis articulates with the atlas via its superior articular facets, which are convex and face upward and outward.
Does C2 have a body?
The upper cervical spine consists of the atlas (C1) and the axis (C2). The atlas is ring-shaped and does not have a body, unlike the rest of the vertebrae. Fused remnants of the atlas body have become part of C2, where they are called the odontoid process, or dens.
What is another name for C2?
The C1 and C2 vertebrae are the first two vertebrae of the cervical spine. They are also called the atlas and axis vertebrae.
What nerves are affected by C1 C2?
C1, C2, and C3 (the first three cervical nerves) help control the head and neck, including movements forward, backward, and to the sides. The C2 dermatome handles sensation for the upper part of the head, and the C3 dermatome covers the side of the face and back of the head. (C1 does not have a dermatome.)
Why are C1 and C2 special?
The C1 and C2 vertebrae are uniquely shaped and have vertebral foramen (spaces within the bone) which allow the vertebral arteries and veins to reach through to the brain and supply it with blood. This unique formation is only seen in the cervical vertebrae.
What is C1 C2 subluxation?
(C1–C2 Subluxation) Atlantoaxial subluxation is misalignment of the 1st and 2nd cervical vertebrae, which may occur only with neck flexion. Atlantoaxial subluxation can result from major trauma or can occur without trauma in patients with rheumatoid arthritis, juvenile idiopathic arthritis, or ankylosing spondylitis.
Can a C1 fracture cause paralysis?
C1 and C2 Vertebrae Breaks, Fractures, and Misalignments Symptoms following an injury to the cervical vertebrae C1 and C2 may include: Complete paralysis of arms and legs. Muscle atrophy. Limited head and neck movement.
Can you survive a C1 fracture?
Injuries to the C1 and C2 vertebrae are rare, accounting for only 2% of spinal injuries each year. However, they are also considered to be the worst spinal cord injury that it is possible to sustain, and often fatal.
Can you recover from a C1 fracture?
Isolated atlas fractures can be effectively managed with 8 to 12 weeks of external immobilization of the craniocervical junction [3]. Collar immobilization or cervical traction for this period of time is usually sufficient to allow for proper healing; however, the type of orthosis required varies [3, 20].