Practical topic 9 Flashcards
Give the mm. constrictores medii
- M. pterygopharyngeus
- M. palatopharyngeus
- M. hyopharyngeus
- M. stylopharyngeus
Give the mm. constrictores caudales
- M. thyropharyngeus
- M. cricopharyngeus
M. pterygopharyngeus
Origin: pterygoid bone
Insertion: Pharyngeal raphe
Action: Medial pharyngeal constrictor
Very small, in front of os hyoideum
M. palatopharyngeus
Origin: Edge of palatine and pterygoid bones (the apparatus of the soft palate?
Insertion: Pharyngeal raphe
Action: Medial pharyngeal constrictor
M. hyopharyngeus
Origin: Caudal surface of thyrohyoid bone
Insertion: Pharyngeal raphe
Action: Medial pharyngeal constrictor
M. stylopharyngeus
Origin: Stylohyoid, medial surface of rostral end
Insertion: Pharyngeal raphe
Action: Medial pharyngeal constrictor
M. thyropharyngeus
Origin: Thyroid lamina, dorsal on thyroid cartilage
Insertion: Pharyngeal raphe
Action: Caudal pharyngeal constrictor
M. cricopharyngeus
Origin: Cricoid cartilage
Insertion: Pharyngeal raphe
Action: Caudal pharyngeal constrictor
Give the muscles of the hyoid bone
- M. sternohyoideus
- M. sternothyroideus
- M. thyrohyoideus
M. sternohyoideus
Origin:
- Sternum
- 1st costal cartilage
- Fused to deeper m. sternothyroideus at the first part
Insertion: Os basohyoideus
Action: Pulls the hyoid bone, radix linguae and larynx caudally
M. sternothyroideus
Origin: 1st costal cartilage / manubrium
Insertion: Thyroid lamina (thyroid cartilage)
Action: Draw larynx and tongue caudally
M. thyrohyoideus
Origin: Thyroid cartilage
Insertion: Thyroid bone
Where the two muscles meet dorsally. Lies dorsal to m. sternohyoideus
Location of gl. thyroidea
- Lateral to first 5 tracheal rings (on trachea), usually with 2 lobes
- Dark color
