Deep Structures of the Neck Flashcards
What does the superficial cervical fascia enclose?
Platysma muscle
Cutaneous nerves
Superficial veins
Lymph nodes
Which of the following is not a part of the deep cervical fascia?
A. Investing layer of Deep Cervical Fascia
B. Pretracheal Fascia
C. Prevertebral Fascia
D. Carotid Sheath
E. Superfical layer
E. Superficial layer
What does the investing layer of the deep cervical fascia enclose?
sternocleidomastoid and trapezius
What structure is between the pretracheal fascia and prevertebral fascia?
sympathetic trunk
What does the pretracheal fascia enclose?
thyroid gland
Trachea
Esophagus
What does the prevertebral fascia enclose?
vertebral column and deep muscles of back
Which of the following does the carotid sheath not enclose? A. Common Carotid Artery B. Internal Carotid Artery C. Internal Jugular Vein D. Vagus Nerve E. Phrenic Nerve F. Deep Cervical Lymph Nodes
E. Phrenic Nerve
What is significant about the external carotid artery in the carotid sheath?
It exits before giving off its branches
What is the function of fascial layers?
provide slippery surface to reduce friction
What is a clinical significance of the fascial layers?
Serves as a channel for infections
Can spread from head and neck to madiastinum directly
What is the superior thoracic aperture?
opening through which structures of the neck pass into the thorax
Which of the following is not a boundary for the superior thoracic aperture? A. first thoracic vertebra B. Clavicle C. First ribs and cartilages D. Manubrium of sternum
B. clavicle
Which of the following arteries does not pass through the superior thoracic aperture? A. Brachiocephalic Trunk B. Left Common Carotid Artery C. Left Subclavian Artery D. Superior Thoracic Artery E. Internal Thoracic Artery
D. Superior Thoracic Artery
What is the only vein that runs through the superior thoracic aperture? A. Brachiocephalic Vein B. Subclavian Vein C. Median Vein D. Internal Carotid Vein
A. Brachiocephalic Vein
Which of the following nerves does not pass through the superior thoracic aperture? A. Phrenic Nerve B. Vagus Nerve C. Recurrent Laryngeal Nerve D. Sympathetic Trunk E. Hypoglossal Nerve
E. Hypoglossal Nerve
Which of the following viscera structures does not pass through the superior thoracic aperture? A. Trachea B. Esophagus C. Cervical Pleura D. Apex of Lung E. Thymus F. Thyroid
F. Thyroid
What is the significance of the apex of the lung and fractured first rib?
fractured first rib can puncture apex of lung causing atelectasis (lung collapse)
What system is the thymus a part of?
Immune system
What does the thymus produce?
T-Lymphocytes
What is the blood supply to the thymus?
internal thoracic artery
What is the innervation of the thymus?
stellate ganglion of sympathetic trunk and vagus
What happens to T-cells in the thymus?
they mature over time and this reduces the immune system
What kind of organ is the thyroid gland considered?
endocrine organ
What does the thyroid gland produce?
thyroxine and calcitonin
Between what vertebral levels does the thyroid gland lie?
cervical vertebra 5 through thoracic vertebra 1
What are the four structures of the thyroid gland?
Left and Right lobe
Isthmus
Pyramidal lobe
Which of the following is only present in half the population? A. Right lobe B. Left lobe C. Isthmus D. Pyramidal lobe
Pyramidal lobe
What muscle is only present in 10% of the population and connects the thyroid gland to the hyoid bone?
levator glandulae thyroideae muscle
What are the two arteries that supply the thyroid gland?
Superior and Inferior thyroid artery
What artery is only present in 10% of the population and supplies the thyroid gland?
Thyroid Ima Artery (may be damaged in tracheotomy)
What are the three veins that are associated with the thyroid gland?
Superior, Middle, Inferior thyroid vein
What is the innervation of the thyroid gland?
superior, middle, inferior cervical sympathetic ganglia
What is a goiter?
abnormal enlargement of thyroid gland
What is an endemic goiter?
caused by dietary deficiency of iodine
What is an exophthalmic goiter
caused by autoimmune disease
What does the recurrent laryngeal nerve do after it branches off of vagus within thorax?
motor innervation to all but one of the laryngeal muscles
What kind of gland is a parathyroid gland considered?
endocrine gland
What is the parathyroid gland involved in?
calcium homeostasis, they are essential to life
There are normally 4 parathyroid glands but the numbers varies between what?
2 and 6 glands
What is the blood supply to the parathyroid gland?
inferior and superior thyroid artery
What is the innervation to the parathyroid gland?
inferior or middle cervical sympathetic ganglia
What are the difficulties of thyroid surgery?
parathyroid glands here
vascularity (lots of bleeding)
presence of recurrent laryngeal nerve
What level is the trachea located at?
cervical vertebra 6
What is the purpose of the incomplete cartilaginous rings which are open posteriorly covering the trachea?
Allows for expansion of the trachea
What is the muscle that spans the back of the cartilaginous rings?
trachealis muscle
What is the blood supply to the trachea?
inferior thyroid artery
What is the innervation of the trachea?
Recurrent Laryngeal Nerve
What does the esophagus connect?
pharynx to the stomach
What level does the esophagus set at?
cervical vertebra 6
What does the common carotid split into?
Internal and External Carotid Artery
When the internal carotid artery enters the skull through the carotid canal what does it supply?
brain
What does the external carotid artery supply?
neck, face, and scalp
Which of the following is not a branch of the external carotid artery? A. Superior Thyroid artery B. Ascending Pharyngeal Artery C. Lingual Artery D. Facial Artery E. Inferior temporal artery F. Occipital artery G. Posterior Auricular Artery H. Superior temporal artery I. Maxillary artery
E. inferior temporal artery
What two arteries of the external carotid have a pulse?
facial and superficial temporal artery
What are the terminal branches of the external carotid artery?
Superficial temporal and maxillary artery
What does the carotid sinus do?
It is a baroreceptor (blood pressure sensor)
What is the carotid sinus innervated by?
carotid sinus nerve
What does the carotid body do?
It is a chemoreceptor (detects changes in chemical makeup of blood within the carotid)
What is the carotid body innervated by?
carotid sinus nerve
What is the largest vein of the neck?
internal jugular vein
What does the internal jugular vein drain into?
Brachiocephalic vein
What is the superior jugular bulb?
dilation of the internal jugular vein at its origin below the jugular foramen
Which of the following is not a tributary of the internal jugular vein? A. Inferior Petrosal Sinus B. Pharyngeal veins C. Facial vein D. Submandibular vein E. Lingual vein F. Superior Thyroid vein G. Middle Thyroid vein
D. submandibular vein
What is the Inferior Jugular Bulb?
Dilation of the internal jugular vein near its termination into the brachiocephalic vein