posterior triangle anterior triangle mandibl e median plane sternocleidomastoid
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Omohyoid (superior
belly)
Sternocleidomastoid
Median plane
Contents: Infrahyoid mm Cricothryoid m Thyroid gland Parathyroid
gland
Thyroid Cartilage Thyrohyoid
membrane Cricoid Cartilage
Cricothyroid ligament
Thyrohyoid Membrane
Thyroid Cartilage
Cricoid Cartilage
Laryngeal Prominence
Superior Horn
Inferior HornOblique
line
Cricothyroid ligament
Variation Pyramidal lobe
Vasculature Superior Thyroid A Inferior Thyroid A Thyroid Ima
(occassionally)
Superior Thyroid
A
Inferior Thyroid A
Considerations Thyroid Ima A Recurrent Laryngeal
NN
Thyroid Ima
A
Recurrent Laryngeal N
Parathyroid Glands
The Center for Advanced Head and Neck Surgery. http://www.waent.org/archives/2009/vol2-1/parathyroid/parathyroid.htm
Recurrent Recurrent
Digastric Anterior Belly Posterior Belly
Stylohyoid Mylohyoid Geniohyoid
Digastric (ant)
Mylohyoid
Stylohyoid
Digastric (ant)
Stylothyoid
Digastric (post)
Digastric (post)
Geniohyoid
Sternocleidomastoid
Omohyoid (superior
belly)
Digastric (posterior belly) Contents:
Common Carotid A.
Internal Carotid A. External Carotid A.
Branches Internal Jugular V. Hypoglossal N. Vagus N.
(branches) Parts of Cervical
Plexus
Bifurcation Branches
Superior Thyroid A. Superior Laryngeal A.
Lingual A. Facial A. Ascending Pharyngeal A. Occipital A. Others:
Maxillary A. Superficial Temporal A. Posterior Auricular A.
Subclavian A.
Common Carotid A.
Superior Thyroid A.
Lingual A.
Occipital A.
Ascending Pharyngeal A.Facial A.
Investing Fascia
Pretracheal Fascia Prevertebral Fascia
Carotid Sheath
Carotid Sheath Internal Jugular V. Vagus N. Common Carotid A.
Then, Internal Carotid A
Sternocleidomastoid (cut)
Carotid Sheath
VPR C1-C4 Phrenic nerve Cutaneous branches* already seen in the posterior
triangle
Muscular branches
Fig 8.11 Clinically Oriented Anatomy 5th Ed. Moore & Dalley
. Ansa cervicalis
Superior root (C1) Inferior root (C2,3)
N. to thyrohyoid
Hypoglossal N (CN XII)
VPR C1
Nerve to Thyrohyoid
Superior root of Ansa Cervicalis
Inferior root of Ansa Cervicalis
Phrenic N
C2
C3
Phrenic N Unnamed nerves
prevertebral mm.
N. to thyrohyoid Ansa cervicalis
Superior root Inferior root
Fig 7.8, Grant’s Dissector 14th Ed.
Mandible
Digastric(Post. Belly)
Digastric(Ant. Belly)
Contents: Submandibular
gland Facial A. & V. Stylohyoid M. Lymph Nodes Hypoglossal N
(portion)
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