A5 - Manidble, temporomandibular joint, hyoid skeleton, muscles of mastication Flashcards
Manidble, temporomandibular joint, hyoid skeleton, muscles of mastication
1
Q
Give the muscles of mastication
A
2
Q
M. masseter
A
- Origin: Arcus zygomaticus, ventral border. It has three insercting layers
- Insertion: Fossa masseterica of mandible (lateral surface)
- Action: Closes jaw
3
Q
M. temporalis
A
-
Origin:
- From fossa temporalis and its border:
- Linea temporalis
- Crista saggitalis externa
- Crista nuca
- Arcus zygomaticus, dorasl edge
- From fossa temporalis and its border:
- Insertion: Processus coronoideus on mandible
- Action: Raises mandible, closes jaw
4
Q
M. pterygoideus medialis
A
- Origin: Fossa pterygopalatina (from sphenoid, palatine and pterygoid bones)
- Insertion: Fossa pterygoidea (medially, below foramen mandibulae)
-
Action:
- Grinding movements
- Closes jaw
5
Q
M. ptereygoideus lateralis
A
- Origin: Ventral to canalis alaris and fissura orbitalis from os sphenoidale
- Insertion: Fovea pterygoidea (medially next to processus condylaris of mandible)
-
Action:
- Grinding movements
- Closes jaw
6
Q
M. digastricus
A
- Origin: Processus paracondylaris of os occipitale
- Insertion: Ventral-ventromedial border of mandible
- Action: Opens mouth
7
Q
Give the facial musculature
A
8
Q
Give the muscles of lips and cheeks
A
- M. orbicularis oris
- Mm. incisivi
- M. levator nasolabialis
- M. levator labii maxillaris
- M. caninus
- M. depressor labii
- M. mentalis
- M. zygomaticus
- M. buccinator
9
Q
Give the muscles of the eyelids
A
- M. orbicularis oculi
- M. superciliaaris/M. levator anguli oculimedialis
- M. retractor/M. retractor anguli oculilateralis
10
Q
Give the muscles of the external ear
A
- M. scutularis
- M. parotidoauricularis
- Abductors – Mm. auricularis caudalis
- Elevators – Mm. auricularis dorsalis
- Adductors – Mm. auricularis rostralis
- Rotators – Mm. auricularis profundus
- Auditory meatus muscle
- Muscles of the conchal cartilage
11
Q
Mandible
Draw the mandible
A
12
Q
Mandible
Give the interspecies differences of the mandible
A
- Curved margo ventralis (ru, ca)
- Incisura vasorum facialum (ø ca)
- For. mentale (eq, bo)
- Forr. mentalia (ca, sus)
- Proc. angularis (ca)
- Tuberositas m. sternomandibularis (eq)
- Diastema (ø ca)??????
13
Q
Mandible
Give the channels of the mandible, and their role
A
- For. mandibularis (med.) → canalis mandibularis → for. mentale/forr. mentalia (lat.) (su: lat+med)
- Canal for n. alveolaris inferior
-
Canales alveolaris
- Nerves and vessels for canine and incisor teeth
14
Q
Give the features of the temporomandibular joint, art. temporomandibularis
A
- Synovial, condylar joint
- Between ramus mandibulae and pars squamosa of os temporale
-
Articular convexity:
- Caput mandibulae of proc. condylaris of mandibula
-
Articular concavity:
- Processus retroarticularis of temporal bone
- Movements:
- Opening and closing (hinge-movement) (lig. caudale)
- Grinding – lateral movement (lig. laterale)
Structures:
- Capsula articularis
- Discus articularis (Dividing the joint into two chambers)
- Lig. laterale (Ligament of the lateral surface of capsula articularis)
- Lig. caudale (eq, bo) (Elastic ligament from processus retroarticularis → collum mandibulae)
15
Q
Give the ligaments of the temporomandibular joint
A
-
Lig. laterale
- Strengthens the joint capsule
-
Lig. caudale (ø ca, sus)
- Between processus retroarticularis and collum mandibularis
17
Q
Os hyoideum
Draw os hyoideum
A
