Lab 3 - Neck Flashcards
Which nerve is labeled by #11?
Muscular branch of ansa cervicalis (#9)
Innervates sternohyoid, sternothyroid, and omohyoid muscles
(Note - ansa cervicalis is formed from ventral rami of C1 C2 C3)
Which vessel is labeled by #8?
Common carotid artery
- What are the boundaries of the carotid triangle of the neck?
- Anterior border of the sternocleidomastoid
- Posterior belly of the digastric
- Superior belly of the omohyoid
Which nerve is labeled by #1?
Lesser occipital nerve
innervates the skin of the neck and scalp posterior and superior to the auricle
Which vessels are labeled by #6?
Superficial cervical artery and vein
Which structure is labeled by #4?
External jugular vein
Which vessel is labeled by #9?
Right subclavian vein
Drains the superficial cervical (left) and external jugular (right) veins
Which number labels the brachial plexus?
The brachial plexus may be compressed between which two muscles in the lateral neck?
Brachial plexus = 11
May be compressed between the anterior scalene (10) and the middle scalene (4)
Which structure is labled by G?
Esophagus
(Remember that this is compressed unless we are swallowing!)
Which structure is labled by E?
Infrahyoid strap muscles
Which bone is labled by A?
Frontal bone
Which structure is labeled by #19?
Intermediat tendon of the digastric
Which muscle is labeled by #13?
Sternothyroid
Which nerve is indicated by the X?
What does it innervate?
Mylohyoid nerve
Motor to the muscles under the mandible
(A branch of the inferior alveolar nerve, which is a branch of V3)
Which nerve is labeled by #5?
Vagus (CN X)
What are the boundaries of the muscular triangle of the neck?
- Superior belly of the omohyoid
- Anterior border of the sternocleudomastoid
- Midline of the neck
(Strap muscles are inside of the muscular triangle)
Which muscle is labeled by #14?
Thyrohyoid
Which vessel is labeled by #22?
Facial artery
Which vessel is labeled by #3?
Occipital artery
(Branch of the external carotid)
Which structure is labeled by #7?
What innervates it?
Platysma
CN VII - the facial nerve
(The platysma is a muscle of facial expression)
What are the boundaries of the submandibular triangle of the neck?
- Inferior border of the mandible
- Anterior and posterior bellies of the digastric
Which bone is labled by E?
Parietal
Which muscle is labeled by #12?
Sternocleidomastoid
Which muscle is labeled by #10?
Anterior belly of omohyoid
Which nerve is labeled by #2?
Greater auricular nerve
Which muscle is labeled by #10?
Sternocleidomastoid
Which nerve is labeled by #4?
Supraclavicular nerve
Which muscle is indicated by the X?
Sternothyroid
Deep to the sternohyoid
Which vessel is labeled by #21?
Lingual artery
Which structure is labeled by #20?
Submandibular salivary gland
Which muscle is labeled by #7?
Omohyoid (inferior belly)
Which nerve is labeled by #1?
Vagus nerve
Which bone is labled by C?
Mandible
Which bone is labled by D?
Occipital
What structure is labeled by #9?
Prevertebral fascia
Which structure is labeled by #6?
Anterior jugular vein
Which muscle is labeled by #10?
Anterior scalene
Which muscle is labeled by #5?
Trapezius
Which structure is labled by D?
Trachea
Which nerveis labeled by #18?
Hypoglossal nerve (CN XII)
(Also #2 in this image)
Which structure is labled by B?
Common carotid artery
(Has not split yet)
Which nerve runs inside of the carotid sheath?
Vagus nerve
Which nerves in this image are part of the cervical plexus?
- 1 - Lesser occipital
- 2 - Greater auricular
- 4 - Supraclavicular
- 8 - Transverse cervical
(Honestly though if they give us this question with the nerves cut like this I’m just taking the L)
Which nerve is labeled by #6?
Brachial plexus
Which nerve is labeled by #9?
Ansa cervicalis
(#11 is the muscular branch of the ansa cervicalis which innervates sternohyoid, sternothyroid, and omohyoid muscles)
Which layre of fascia is labeled by #3?
Deep fascia
Which muscle is labeled by #6?
Posterior scalene
If you can see the turbinates in a saggital non-contrast CT, you are [medial/lateral] to the maxillary sinuses
Medial
The maxillary sinuses and the turbinates are at the same level in the head; the maxiallary sinuses are lateral and the turbinates are medial
(This image is a slice that is medial to the maxillary sinuses)
Which muscle is labeled by #1?
Splenius captis
Which muscle is labeled by #7?
Sternocleidomastoid
Which muscle is labeled by #3?
Levator scapulae
Which nerve structure is labeled by #11?
Brachial plexus
Which vessel is labeled by #15?
Superior thyroid artery
(The first branch of the external carotid artery)
Which nerve is labeled by #3?
Spinal accessory nerve (CN XII)
Which structure is labled by F?
Sternocleidomastoid muscle
Which muscle is labeled by #4?
Middle scalene
Which structure is labeled by #16?
Hyoid bone
Which structure is labled by A?
Internal jugular vein
Which nerve is labeled by #6?
Superior root of the ansa cervicalis
(Aka descendens hypoglossus)
- Travels with the hypoglossal nerve (CN XII) - #2 in this image
- Gives rise to ansa cervicalis (#9, muscular branch #11), the nerve that innervates the strap muscles
Which bone is labled by B?
Maxilla
Which muscle is labeled by #4?
Internal jugular vein
Which structure is labled by C?
Thyroid gland
Which nerve is labeled by #2?
Hypoglossal (CN XII)
Note - CN XII crosses the externa and internal carotid arteries in the carotid triangle
(CN XII is also #18 in this image)
Which vessels are labeled by #5?
Which muscle is going in between them?
Subclavian vein and artery
Anterior scalene
(Note - the subclavian artery may be compressed between the middle and anterior scalene mucles, but the subclavian vein will not be)
Which nerve is labeled by #3?
Recurrent laryngeal nerve branch of CN 10
Innervates all intrinsic muscles of the larynx except cricothyroid which is innervated by the superior laryngeal
Which vessel is labeled by #23?
External carotid artery
Which muscle is labeled by #17?
Stylohyoid
Which bone is labled by F?
Sphenoid
Which nerve is labeled by #2?
CN XI (Spinal accessory)
Which nerve is indicated by the X?
What does it innervate?
Ansa cervicalis
Part of the cervical plexus
Motor to the infrahyoid strap muscles
Which layer of fascia is labeled by #5?
What does it contain?
Pretracheal fascia
- Trachea
- Infrahyoid muscles
- Thyroid gland
- Esophagus
What are the boundaries of the anterior triangle in the neck?
- Anterior border of the sternocleidomasstoid
- Inferior border of the mandible
- Midline of the neck
Which structure is labeled by #12?
Thyroid gland
Which vessel is labeled by #24?
Internal carotid artery
Which vessel is labeled by #11?
External jugular vein
Which muscle is labeled by #5?
Trapezius
Which muscle is labeled by #1?
Posterior belly of the digastric
Which structure is labeled by #4?
Thoracic duct
Which structure is labeled by #2?
Parotid gland
Which nerve is labeled by #7?
Phrenic nerve
Which muscle is labeled by #8?
Inferior belly of the omohyoid
Which nerve is labeled by #13?
Phrenic nerve
Which nerve is labeled by #8?
Transverse cervical nerve
What are the boundaries of the submental triangle of the neck?
- Anterior belly of both digastric muscles
- Hyoid bone
Note - this is the only unpaired triangle
