Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
Carotid Sheath
-3 layers -contents |
-investing fascia (outer layer)
-pretracheal fascia -prevertebral fascia -contents: common carotid a., internal jugular v., vagus n. *common carotid branches into internal and external at ~C4 |
|
Boundaries of Anterior Triangle
|
-superiorly: inf. border of mandible
-posteriorly: SCM -anteriorly: midline of neck (imaginary line) |
|
Anterior Belly of Digastric M.
|
I: mylohyoid n. (V3)
A: depresses mandible; raises hyoid bone and steadies it during speaking/swallowing O: digastric fossa of mandible I: intermediate tendon of body and greater horn of hyoid bone |
|
Posterior Belly of Digastric M.
|
I: facial n.
A: depresses mandible; raises hyoid bone and steadies it during speaking/swallowing O: mastoid notch of temporal bone I: intermediate tendon of body and greater horn of hyoid bone |
|
Platysma
|
I: facial n. (cervical branch)
A: draws corners of mouth inferiorly and widens (sadness/fright); draws skin of neck superiorly when teeth are clenched O: fascia covering clavicle; superior parts of pec major and deltoid I: inf. border of mandible; skin and subcutaneous tissues of lower face |
|
Submental Triangle: Borders
|
-inferiorly: body of hyoid bone
-laterally: ant. belly of digastrics m. -floor: mylohyoid m. |
|
Submental Triangle: Contents
|
-submental lymph nodes
-mylohyoid m. (forms floor) -mylohyoid n. -veins that unite ant. jugular vs. |
|
Submandibular Triangle: Boundaries
|
-superiorly: inf. border of mandible
-medially: ant. belly of digastrics m. -laterally: post. belly of digastrics m. |
|
Submandibular Triangle: Floor
|
-mylohyoid m.
-hyoglossus m. -middle pharyngeal constrictor m. |
|
Mylohyoid M.
|
I: mylohyoid n. (V3)
A: elevates hyoid bone/floor of mouth/tongue during speaking/swallowing O: mylohyoid line of mandible I: raphe and body of hyoid bone |
|
Hypoglossus M.
|
I: hypoglossal n. (CN XII)
A: depresses and retracts tongue O: body and greater horn of hyoid bone I: lateral side and inf. aspect of tongue |
|
Middle Pharyngeal Constrictor M.
|
I: spinal accessory n. (CN XI via CN X)
A: constrict wall of pharynx during swallowing O: stylohyoid ligament and greater/lesser horns of hyoid bone I: median raphe of pharynx |
|
Submandibular Triangle:
Contents |
-submandibular gland
-submandibular lymph nodes -facial a. -facial v. (empties into internal jugular v.) -CN XII -mylohyoid n (V3) |
|
Muscular Triangle:
Boundaries |
-superior-laterally: superior belly of omohyoid m.
-inferior-laterally: ant. border of SCM -medially: midline of neck |
|
Muscular Triangle:
Contents: Infrahyoid Ms. AKA Strap Ms. |
-sternohyoid (superficial)
-omohyoid (superficial) -sternothyroid (deep) -thyrohyoid (deep) |
|
Muscular Triangle:
Contents: Non-muscular Structures: |
-thyroid gland
-parathyroid glands -L/R recurrent laryngeal ns. -ant. jugular v. -larynx -trachea |
|
Omohyoid M.
|
I: ansa cervicalis
A: depresses, retracts and steadies hyoid bone O: superior border of scapula near suprascapular notch I: inf. border of hyoid bone |
|
Sternohyoid M.
|
I: ansa cervicalis
A: depresses hyoid after elevation from swallowing O: manubrium of sternum; medial end of clavicle I: body of hyoid bone |
|
Thyrohyoid M.
|
I: C1 via CN XII
A: depresses hyoid and elevates larynx O: oblique line of thyroid cartilage I: inf. border of body and greater horn of hyoid |
|
Sternothyroid
|
I: ansa cervicalis
A: depresses hyoid bone and larynx O: 1st costal cartilage; post surface of manubrium I: oblique line of thyroid cartilage |
|
Thyroid Gland:
-Structures? -Function? |
-left and right lobe connected by the isthmus
-50% have a pyramidal lobe -produces: triiodothyronine (T3) and thyroxine (T4), which regulate metabolism; calcitonin |
|
Thyroid Gland:
Arterial Supply |
-superior thyroid a. off external carotid
-inf. thyroid a. off thyrocervical trunk -10% have thyroid ima a. |
|
Thyroid Gland:
Venous Drainage |
-superior thyroid v. draining into internal jugular
-middle thyroid v. draining into internal jugular -inf. thyroid v. draining into L/R brachiocephalic v |
|
Parathyroid Gland:
-Function? |
produces PTH, which increases Ca (antagonistic to calcitonin)
|
|
Carotid Triangle:
Boundaries: |
-medially: omohyoid m.
-laterally: SCM -superiorly: post. belly of digastric |
|
Carotid Triangle:
Contents: |
-carotid sheath structures
-external carotid a. and some branches -superior laryngeal n. and its external and internal branches -spinal accessory n. (CN XI) -hypoglossal n. (CN XII) -ansa cervicalis |
|
External Carotid Branches
-Non-terminal? -Terminal? |
(inferior to superior) SALFOP
-superior thyroid -ascending pharyngeal -lingual -facial -occipital -posterior auricular Terminal Branches: -superficial temporal a. -maxillary a. |
|
Carotid Body:
-Location? -Function? -Innervated by? |
-location: bifurcation of common carotid
-function: chemoreceptor that monitors the level of oxygen in blood -innervated by VA fibers of CN IX |
|
Carotid Sinus
-Function? -Innervated by? |
-function: reacts to changes in arterial blood pressure
-innervated by VA fibers of CN IX |
|
Superior Laryngeal Nerve:
-Arises from? -Branches? -What do the branches innervate? |
-arises from inf. vagal ganglion
-branches: 1. internal laryngeal n. innervates laryngeal mucous mb 2. external laryngeal n. innervates cricothyroid m. |
|
Ansa Cervicalis
-Branches formed by? -Innervates? |
-branches:
1. superior root (C1) 2. inferior root (C2, C3) -innervates all infrahyoid ms. except thyrohyoid |