LARYNGEAL MEMBRANE & MUCOSA
Extrinsic membranes of larynx are all except
| A |
Cricothyroid |
|
| B |
Thyrohyoid |
|
| C |
Hyoepiglottic |
|
| D |
Cricotracheal |
Extrinsic membranes of larynx are all except
| A |
Cricothyroid |
|
| B |
Thyrohyoid |
|
| C |
Hyoepiglottic |
|
| D |
Cricotracheal |
Ans:A.Cricothyroid
Membranes of the Larynx:
Extrinsic membranes connect the laryngeal apparatus with adjacent structures for support.
- The thyrohyoid membrane is an unpaired fibro-elastic sheet which connects the inferior surface of the hyoid bone with the superior border of the thyroid cartilage.
- Cricotracheal membrane connects the most superior tracheal cartilage with the inferior border of the cricoid cartilage .
- Hyoepiglottic Ligament connecting the epiglottis to the hyoid bone.
Intrinsic Membranes connect the laryngeal cartilages with each other to regulate movement.
- Conus Elasticus connects the cricoid cartilage with the thyroid and arytenoid cartilages.
- The paired Quadrangular Membranes connect the epiglottis with the arytenoid and thyroid cartilages.
- Cricothyroid Membrane
| A |
Quadrangular membrane |
|
| B |
Thyrohyoid membrane |
|
| C |
Cricothyroid membrane |
|
| D |
Conus elasticus |
“Thyrohyoid membrane is an extrinsic membrane of the larynx”
Ligaments and membranes of the larynx can be divided into:
- Extrinsic
- Intrinsic
Ligaments and membranes of larynx
| Extrinsic | Intrinsic | |
| Membranes | – Thyrohyoid membranes | – Quadrangular membrane
– Cricothyroid membrane
– Conus elasticus
|
| Ligaments | – Median thyrohyoid ligament
– Lateral thyrohyoid ligament
– Hyoepiglottic ligament
– Cricotracheal ligament
|
– Anterior (median) cricothyroid ligament
– Thyroepiglottic ligament
|
Nerve supply of the mucosa of larynx is ‑
| A |
External laryngel and recurent laryngeal |
|
| B |
Internal laryngeal |
|
| C |
External laryngeal |
|
| D |
Superior laryngeal |
Internal laryngeal
