Triangles

Question 1

occipital triangle

Answer 1

borders:

• sternocleidomastoid
• omohyoid
• trapezius

structures:

• spinal accessory nerve (XI)

Question 2

muscular triangle

Answer 2

borders:

• midline of neck
• omohyoid muscle
• sternocleidomastoid muscle

structures:

• omohyoid
• sternothyroid
• sternohyoid
• (thyrohyoid)

Question 3

carotid triangle

Answer 3

borders:

• posterior belly of digastric muscle
• omohyoid muscle
• sternocleidomastoid muscle

structures:

• hypoglossal nerve
• internal/external carotid artery

Question 4

submental triangle

Answer 4

• the only unpaired triangle

borders: anterior belly of digastric muscles and hyoid bone

structures: lymph under chin

Question 5

posterior triangle

Answer 5

1. subclavian
2. occipital

Question 6

subclavian triangle

Answer 6

borders:

• clavicle
• omohyoid
• sternocleidomastoid

structures:

• subclavian artery
• external jugular vein

Question 7

submandibular triangle

Answer 7

borders: mandible and 2 bellies of digastric msucles

structures: submandibular gland and facial artery

Question 8

anterior triangles

Answer 8

1. submandibular
2. submental
3. carotid
4. muscular