Head And Neck Anatomy

Question 1

Blood supply to the thyroid

Answer 1

Aterial: superior thyroid (external carotid artery) inferior thyroid (thyrocervical trunk)

Venous: superior, middle, inferior

Question 2

Innervation of the larynx

Answer 2

Motor - R.laryngeal except cricothyroid which is supplied by the superior laryngeal

Sensory

• internal branch of superior laryngeal nerve above folds
• recurrent laryngeal nerve below folds

Question 3

Anterior triangle of the neck

Answer 3

Anterior margin of the SCM
Midline
Ramus of the mandible

Roof: inverting fascia

Question 4

Submandibular triangle

Answer 4

Mental process
Ramus of the mandible
Line between two angles of the mandible

Question 5

Posterior triangle of the neck

Answer 5

Posterior margin of SCM
Anterior margin of trapezius
Middle 1/3 of clavicle

Question 6

Branches of the external carotid artery

Answer 6

Superior thyroid 
Ascending pharyngeal 
Lingual 
Facial 
Occipital 
Posterior auricular 
Superficial temporal 
Maxillary 

Some anatomist like fornaicatik other prefer s&m

Question 7

Path of facial nerve

Answer 7

1. Medulla
2. Emerges between pons and medulla
3. Travel in internal auditory canal
4. Exits internal auditory canal and geniculate ganglion in the middle ear
5. Transverse the length of the temporal bone giving off 3 branches: greater superficial petrosal, nerve to the stapedius and corda tympani
6. Exits temporal bone via stylomastoid foramen and runs into the parotid gland
7. Gives of muscle to belly of digastric and stylohyoid before dividing into 5 motor branches: temporal, zygomatic, buccal, mandibular and cervical

Question 8

Different types of neck fascia

Answer 8

Superficial - platysma
Investing - complelty surround neck and encloses SCM and trapezius
Pre-vertebral: surrounds vertebral column and associated muscles
Pre-tracheal: surrounds trachea, oesophagus and thyroid
Carotid sheath: surround internal carotid, internal jugular and CNX