Neck Flashcards
Suprahyoid muscles
- Name them
- Action
- Vascular supply
- Innervation
1.1.
Stylohoid, mylohyoid, geniohyoid, digastric
- Elevate hyoid bone
- Facial, occipital and lingual artery
1.4.
Stylohyoid - Stylohyoid branch facial
Mylohyoid - inferior alveolar branch - V3
Digastric anterior belly - inferior alveolar branch - V3
Geniohyoid - C1 nerve root that run within hyoglossal
Infrahyoid muscles
- Name them
- Action
- Vascular supply
- Innervation
1.1.
Thyrohyoid, omohyoid, sternohyoid, sternothryoid
- Depresses hyoid bone
- Superior and inferior thyroid arteries
- Anterior rami C1-3 - branches of ansa cervicalis
Thyrohyoid - C1 carried by hyoglossal nerve
Scalene muscles
- Name them
- Action
- Attachments
- Innervation
1.1.
Anterior, Middle and Posterior
1.2.
Flexion of the neck, ipsilateral SF
Accessory muscles of respiration
1.3.
Anterior scalene - scalene tubercle (inner border 1st rib)
Middle - as above
Posterior - second rib
1.4.
C5-6, C3-8 and C6-8 respectively
Brachial plexus exits via which anatomical structure?
It is accompanied by which anatomical structure?
Anterior and middle scaleni muscles
Subclavian artery
Which anatomical structure(s) pass anterior to anterior scaleni
Subclavian vein and phrenic nerve
Name the borders of the anterior triangle of the neck?
Superior - Inferior border mandible
Medial - line drawn down the midline of the neck
Lateral - Anterior border of SCM
Roof - investing fascia
Which anatomical structures lie within the anterior triangle of the neck
Common carotid artery bifurcates into ECA + ICA
IJV - venous drainage of head and neck
CN 9-12
Infra and suprhyoids
Name the subdivisions within the anterior triangle of the neck and their borders
- Carotid triangle
Superior - Posterior belly digastric
Lateral - Anterior border SCM
Inferior - Omohyoid
- Submental
Inferiorly - hyoid bone
Medially - midline neck
Laterally - anterior belly digastric
Floor - mylohyoid
- Submandibular
Anterior - anterior belly digastric
Posterior - posterior belly digastric
Superiorly - body of mandible
Contents of the carotid triangle
Common carotid artery
IJV
Vagus and hyoglossal nerves
Name the boundaries of the posterior triangle of the neck
Anterior - posterior border SCM
Posterior - anterior border upper trapezius
Inferior - middle 1/3 clavicle
List the layers of fascia from superficial to deep in the neck
Superficial cervical fascia Deep cervical fascia - Investing layer - Pretracheal layer (muscular and visceral part) - Prevertebral layer - Carotid sheath
Define the retropharyngeal space
Located between the buccopharyngeal fascia (posterior aspect of the visceral pretracheal fascia) and the prevertebral fascia.
Extends from BOS to posterior mediastinum
Anatomical relations of the thyroid gland
Anterior - pretracheal fascia (visceral layer), infrahyoid muscles
Posterior - cricoid cartilage, trachea rings, C5-T1 vertebrae
Lateral - Carotid sheath
Medial - larynx, pharynx, trachea, oesophagus, external and recurrent laryngeal nerves
Name the arterial supply of the thyroid gland
Superior thyroid artery - branch of ECA - lies in close proximity to external branch of superior laryngeal nerve
Inferior thyroid artery - thyrocervical trunk - branch of subclavian - close proximity to recurrent laryngeal nerve
Thyroid ima artery - 10% of people - supplies isthmus (anterior surface)
Venous drainage
Superior, middle thyroid artery - drains into IJV
Inferior thyroid arteries - drains into branchiocephalic vein
Lymphatic drainage of thyroid gland
Paratracheal and deep cervical nodes
Which embryological structure are the superior parathyroid glands derived from?
4th pharyngeal pouch
Which embryological structure are the inferior parathyroid glands derived from?
3rd pharyngeal pouch
Vascular supply of the thyroid gland
Inferior thyroid artery
Superior thyroid and thyroid ima artery - collateral supply
Venous drainage
Superior, middle and inferior thyroid vein
The pharynx is a muscular tube that connects the oral and Nasal cavity to the larynx and oesophagus.
- Describe it’s divisions and anatomical locations
- Contents
- Lined with which cell type
1.1.
Nasopharynx - BOS and soft palate
Oropharynx - soft palate and superior border of the epiglottis
Laryngopharynx - superior border of the epiglottis to C6 - continuous inferior with the oesophagus
1.2.
Nasopharynx - adenoids tonsils (enlarge between ages 3-8 and then regress)
Oropharynx - posterior 1/3 tongue, lingual tonsils, palatine tonsils (between the palatoglossal and palatopharyngeal arches), superior constrictor muscle
Laryngopharynx - middle and inferior constrictor muscles
1.3.
Nasopharynx - ciliated pseudostratified columnar epithelium
Oropharynx -
The muscles of the pharynx are innervated by vagus with the exception of one.
- Name this muscle
- Innervation
- Stylopharyngeus muscle
1. 2. Glossopharyngreal nerve