Term
| What four triangles make up the Anterior triangle of the neck? |
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Definition
1. Carotid Triangle
2. Submandibular triangle
3. Submental triangle
4. Muscular triangle |
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Term
| What are the boundaries of the Carotid Triangle? |
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Definition
*Boundaries:
-Superior: Post. Belly of Digastric m.
-Medial: Sup. Belly of Omohyoid m.
-Lateral: SCM |
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Term
| What are the contents of the Carotid Triangle? |
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Definition
•Carotid Sheath
•External Carotid Artery
•Hypoglossal Nerve (CN XII)
•Deep Cervical Lymph Nodes
•Ansa Cervicalis |
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Term
| What are the boundaries of the Submandibular Triangle? |
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Definition
*Boundaries:
-Superior: Inferior border of mandible.
-Medial: Anterior belly of digastric m.
-Lateral: Posterior belly of digastric m |
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Term
| What are the contents of the Submandibular triangle? |
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Definition
•Submandibular Gland
•Facial Artery and Vein
•Hypoglossal Nerve (CN XII)
•Cervical Lymph Nodes
•Nerve to Mylohyoid |
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Term
| What are the boundaries of the Submental Triangle? |
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Definition
•Superior: Inferior border of mandible.
•Lateral: Anterior belly of digastric m.
•Floor: Mylohyoid m. |
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Term
| What are the contents of the Submental triangle? |
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Definition
•Anterior Jugular Vein
•Submental Lymph Nodes – very important because the drain the anterior portion of the lower lip and the tongue |
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Term
| What are the boundaries of the Muscular Triangle? |
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Definition
•Superior: Superior belly of omohyoid m.
•Medial: Midline of neck.
•Lateral: SCM |
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Term
| What are the contents of the Muscular triangle? |
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Definition
*Infrahyoid Muscles
*Viscera of Neck |
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Term
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Definition
*Origin:
-Posterior belly: mastoid notch
-Anterior belly: digastric fossa of mandible
*Insertion: hyoid bone
*Innervation:
-Posterior belly: facial nerve
-Anterior belly: nerve to mylohyoid (CN V3)
*Action: raise hyoid, depress mandible |
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Term
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Definition
*Origin: Styloid process of temporal bone
*Insertion: Hyoid bone
*Innervation: Facial nerve
*Action: Raise and retract hyoid |
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Term
| Sternohyoid Muscle (OIIA) |
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Definition
*Origin: manubrium
*Insertion: hyoid
*Innervation: ansa cervicalis
*Action: depress hyoid |
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Term
| Sternothyroid Muslce (OIIA) |
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Definition
*Origin: manubrium
*Insertion: thyroid cartilage
*Innervation: ansa cervicalis
*Action: depress larynx |
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Term
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Definition
*Origin: thyroid cartilage
*Insertion: hyoid
*Innervation: C1
*Action: depress hyoid, elevate larynx |
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Term
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Definition
*Origin: Superior border of scapula
*Insertion: hyoid, central tendon held clavicle
*Innervation: ansa cervicalis
*Action: depress hyoid |
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Term
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Definition
*Origin: Internal aspect (inside)of mandible
*Insertion: Hyoid bone and median raphe`
*Innervation: Nerve to mylohyoid (CN V3)
*Action: Raise hyoid, depress mandible (open mouth), support tongue |
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