4. Describe the location (which bone where applicable and\'or where in the body)

Question

4. Describe the location (which bone where applicable and'or where in the body) AND function of ALL of the following: a) Hyoid b) Sella turcica c) Olecranon d) Cribriform plate e) Mastoid process splin h ad -f beten mobiliy and sabhliy of ajoint and provide TWo contrasting examples to illustrate this atlantoaxial (AA) joint with regard to: the name of the 2 bones that articulate to create the joint classification of the synovial joint by movement (example: the elbow is uniaxial) classification of the synovial joint by shape (example: the elbow is a hinge joint) a) b) c) d) ALL types of movements that can be performed by the joint (depression, elevation, lateral flexion, retraction, etc.?) *You may use a table for question #6 to keep things organized.

Explanation / Answer

4. (a) Hyoid bone;

Location: The hyoid bone is situated in the anterior midline of the neck between the chin and the thyroid cartilage.

Function:It allows a wider range of tongue, pharyngeal and laryngeal movements by bracing these structures alongside each other in order to produce variation.

(b) Sella turcica

Location: This bone is located at the back of the void space identified as the sphenoid sinus, which sits it in the region of the center of the base of the cranium.

Function: Providing the proper place to hold and support the pituitary gland.

(c) Olecranum:

Location:  It is located in the forearm that projects behind the elbow

Function:The olecranon serves as a lever for the extensor muscles that straighten the elbow joint.

(d)Cribriform plate:

Location:The anterior cranial fossa shows a crestlike projection in the midline, the crista galli (“crest of the cock”). This is a place of firm attachment for the falx cerebri, a subdivision of dura mater that separates the right and left cerebral hemispheres. On either side of the crest is the cribriform (pierced with small holes) plate of the ethmoid bone, a midline bone important as a part both of the cranium and of the nose.

Function: The cribriform plate, transmits the olfactory nerves that carry the sense of smell.

(e) Mastoid process:

Location: It is a conical prominence of the temporal bone behind the ear, to which neck muscles are attached, and which has air spaces linked to the middle ear.

Function:It serves as the attachment site for muscles that rotate or extend the head, pointy thingy next to sound hole but on other side then the zygomatic arch.

5. As a joint becomes more stable, it becomes less mobile.

As a joint becomes less stable, it becomes more mobile

Example: The hip, a joint meant primarily for load-bearing, needs to be stable above all else. The shoulder, on the other hand , requires extraordinary mobility to perform its complex tasks. Both are ‘ball and socket’ type joints; yet with a deep socket that practically envelopes the ball of the thigh bone (femur),  the hip is as structurally stable as it gets. On the other extreme, the shoulder has a very shallow socket into which the arm (humerus) fits, giving it about as much structural stability as a golf ball on a tee. In exchange, however, that sucker can move! Up over your head, behind your back, across your chest,

A joint with less inherent stability will always depend more on surrounding structures like muscles and ligaments to stabilize it. This means not only that strong muscles are especially important to protect less stable joints like the shoulder and knee, but also that those joints are particularly susceptible to ligament and muscle injuries.

6 (a) There is a pivot articulation between the odontoid process of the axis and the ring formed by the anterior arch and the transverse ligament of the atlas.

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.