S1 and S2 Dissection

Question 1

Label - Neck - Very Superficial layer

Answer 1

1. Submandibular gland (covered with investing fascia)
2. Parotid gland (covered with investing fascia)
3. Anterior belly of digastric (covered with investing fascia)
4. Infrahyoid muscle (covered with investing fascia)
5. (the top 6) Sternocleidomastoid muscle (covered with investing fascia)
6. Site of vascular access for embalming
7. External jugular vein
8. Fat in posterior triangle
9. Skin and (extremely sparse) platysma muscle

Question 2

Label - Anterior neck

Answer 2

pic

Question 3

Label - Anterior triangle

• The cadavers right and down
• The cadavers left and down

Answer 3

Midline - Median line of neck
Sternocleidomastoid muscle (SCM)

Inferior edge of mandible
Anterior border of SCM

Question 4

Label - Posterior triangle

• The cadavers right and down
• The cadavers left and down

Answer 4

Sternocleidomastoid muscle (SCM)
Posterior border of SCM

Anterior border of trapezius muscle
Middle third of clavicle

Question 5

Label - Left half of submental triangle

Answer 5

Midline - Median line of neck
Hyoid bone

Left anterior belly of digastric

This triangle represents only the left half of the submental triangle. The submental triangle is an unpaired triangle that crosses both sides of the neck. It is bounded laterally by both right and left anterior bellies of digastric

Question 6

Label - Submandibular triangle:

• Cadavers right and down
• Cadavers left and down

Answer 6

Anterior belly of digastric
Posterior belly of digastric

Inferior edge of mandible (hidden by retracted platysma)

Question 7

Label - Muscular triangle

• Cadavers right and down
• Cadavers left and down

Answer 7

Midline - Median plane of neck

Superior belly of omohyoid
Anterior border of SCM

Question 8

Label - Carotid triangle

• Cadavers right and down
• Cadavers left and down

Answer 8

1st arrow - no written label on doc
Superior belly of omohyoid muscle

Posterior belly of digastric muscle
Anterior border of SCM

Question 9

Label - Occipital triangle

• Cadavers right and down
• Cadavers left and down

Answer 9

Posterior border of SCM
Inferior border of omohyoid

Anterior border of trapezius
Clavicle

Question 10

Label - Supraclavicular triangle

• Cadavers right and down
• Cadavers left and down

Answer 10

Posterior border of SCM

Inferior border of omohyoid muscle
Clavicle

Question 11

Label - the triangles

• Cadavers right and down
• Cadavers left and down

Answer 11

Submental
Anterior
Muscular
Posterior

Submandibular
Carotid
Occipital
Supraclavicular