Posterior Triangle Flashcards
What 3 structures are enclosed by the carotid sheath?
- Common carotid artery
- Internal Jugular vein
- Vagus nerve X
What fascia encloses the thyroid gland?
Pretracheal fascia
What fascia enclose the sternocleidomastoid m. and the trapezius m.?
Superficial (investing) layer of deep cervical fascia
The sternohyoid m., sternothyroid m., and the omohyoid m. are all enclosed by what layer of fascia?
Infrahyoid fascia
The intrinsic muscles of the back are enclosed by what fascial layer?
Prevertebral layer of (deep) cervical fascia
What are the boundaries of the posterior triangle?
- SCM
- Clavicle
- Trapezius m.
The inferior belly of the omohyoid m. breaks the posterior triangle into what two triangles?
- Occipital triangle
2. Omoclavicular triangle
What two scalene muscles originate from the 1st rib?
Anterior and middle scalene muscles.
What two landmarks are between the anterior and middle scalene m.?
- Subclavian a.
2. Brachial plexus
What muscle can pull the head downward (flex the neck)?
Anterior scalene m.
What’s the relationship between the anterior scalene muscle, the subclavian artery and vein? KEY RELATIONSHIP.
The anterior scalene runs between the subclavian artery and vein (vein is more anterior, but deep to the 1st rib)
1/2 between the SCM?
Erb’s point
What nerves, originating from Erb’s point, heads anteriorly?
Transverse cervical nerves
What nerve usually follows the posterior border of the SCM?
Lesser occipital (posterior branch of C2)
Dorsal ramus of C1
Suboccipital nerve
