What axis is the sagittal plane on?
Frontal axis
Frontal axis – this line runs from left to right through the centre of the body. For example, when a person performs a somersault they rotate around this axis. Sagittal (also known as the antero-posterior) axis – this line runs from front to back through the centre of the body.
What is the origin of styloglossus muscle?
The styloglossus muscle is an extrinsic muscle of the tongue, and its origin in the styloid process of the temporal bone is well documented. However, some authors have noted variations in its origin.
What is the longitudinal axis of the body?
An imaginary line (one of the anatomical reference axes) running down the centre of the body perpendicular to the transverse plane, around which rotations in the transverse plane (e.g. a body spin during a pirouette) occur. From: longitudinal axis in The Oxford Dictionary of Sports Science & Medicine »
What is the origin of the genioglossus muscle?
Geniohyoid muscle
| Origin | Inferior mental spine (inferior genial tubercle) |
|---|---|
| Insertion | Body of the hyoid bone |
| Action | Elevates and draws hyoid bone anteriorly; shortens the mouth floor; widens pharynx |
| Innervation | Anterior ramus of spinal nerve C1 (via hypoglossal nerve) |
| Blood supply | Sublingual branch of the lingual artery |
What is the origin of the genioglossus?
| Genioglossus | |
|---|---|
| Origin | Superior part of mental spine of mandible (symphysis menti) |
| Insertion | Underside of tongue and body of hyoid |
| Artery | Lingual artery |
| Nerve | Hypoglossal nerve |
What does the hyoglossus muscle articulate with?
| Hyoglossus | |
|---|---|
| Origin | Hyoid |
| Insertion | side of the tongue |
| Nerve | Hypoglossal (CN XII) |
| Actions | depresses and retracts the tongue |
What is the axis of the cervical spine?
The Axis (C2 vertebra) also known as epistropheus forms the pivot upon which the first cervical vertebra (the Atlas ), which carries the head, rotates. The axis is composed of a vertebral body, heavy pedicles, laminae, and transverse processes, which serve as attachment points for muscles.
How does the Axis articulate with the Atlas?
The axis articulates with the atlas via its superior articular facets, which are convex and face upward and outward.
What muscles attach to the spinous process of the spine?
The spinous process serves as the attachment site for many muscles of the spine, particularly those close to the skull, as well as the nuchal ligament. The muscles are semisplinalis servicis,the rectus capitis posterior major,the inferior oblique, the spinalis cervicis, the interspinalis and the multifidus.
What are the pedicles of the vertebral column?
The pedicles are broad and strong, especially in front, where they coalesce with the sides of the body and the root of the odontoid process. They are covered above by the superior articular surfaces. The laminae are thick and strong, and the vertebral foramen large, but smaller than that of the atlas.