Practial 2 Muscles of the Head and Anterior Neck
What is a cutaneous muscle ?
a muscle that insets onto the skin rather than a bone
What is the action of the mylohyoid ?
elevates floor of mouth
What is the action of the masseter ?
elevates mandible
What is the action of the temporalis ?
elevates mandible
What is the action of the zygomaticus ?
elevates the corner of the mouth for smiling
What is the insertion of orbicularis oris ?
encircles the mouth
What is the origin of orbicularis oris ?
encircles the mouth
Where does the orbicularis oculi insert ?
eyelid
What is the origin of the risorius ?
fascia of the cheek
Where does the orbicularis oculi originate ?
frontal bone and maxillary bone
Which muscle is this ?
frontalis
What is the origin of the frontalis ?
galea aponeurotica
What is the insertion of the platysma ?
lower margin of mandible
What is the origin of the mylohyoid ?
mandible
Where does the digastric insert ?
mandible via hyoid bone
What is the origin of the sternohyoid ?
manubrium of the sternum
What is the origin of the sternocleidomastoid ?
manubrium of the sternum and clavicle
Which mastification muscle is this ?
masseter
What is the insertion of the sternocleidomastoid ?
mastoid process of temporal bone
What is the origin of the digastric ?
mastoid process of temporal bone
What is the action of the risorius ?
moves the corner of the mouth laterally
Which muscle is this ? Hint : neck ....
platysma
What is the action of the frontalis ?
raises eyebrows
Where does the masseter insert ?
ramus of mandible
What is this muscle ?
risorius
What is the difference between the zygomaticus and risorius in terms of action ?
risorius is a straight movement meanwhile zygomaticus is an actual smile
What is the action of the sternocleidomastoid ?
rotates neck
Where does the frontalis insert ?
skin of the eyebrows
What muscle is this ? Hint : longer neck muscles
sternocleidomastoid
Which longer neck muscle is this on the cat ?
sternocleidomastoid
What anterior neck muscle is this ?
sternohyoid
What muscle is this on the cat ?
sternohyoid
What is the origin of the temporalis ?
temporal and parietal bones
What is the second muscle of mastification ?
temporalis
What is the action of the platysma ?
tenses skin of neck
What is the origin of the platysma ?
tissue of the chest
Where does the masseter originate ?
zygomatic arch
Where does the zygomaticus originate ?
zygomatic bone
What is this muscle?
zygomaticus
Which anterior neck muscle is this on the cat ?
digastric
Which muscle is this ? Hint... on the anterior neck
digastric
What is the action of the orbicularis oculi ?
closes eye
What is the action of orbicularis oris ?
closes lips
Where does the risorius insert ?
corner of the mouth
Where does the zygomaticus insert ?
corner of the mouth
What is the insertion of temporalis ?
coronoid process of mandible
What is the action of the sternohyoid ?
depress hyoid
What are the 2 actions of the digastrics ?
depresses mandible to open jaw and elevates hyoid to swallow
What is the insertion of the sternohyoid ?
hyoid bone
Where does the mylohyoid insert ?
hyoid bone
What muscle is this on the cat dissection ?
mylohyoid
Which anterior neck muscle is this ?
mylohyoid
Which muscle is this ? Hint: surrounding the eye...
orbicularis oculi
Which muscle is this ? Hint: surrounding the mouth ....
orbicularis oris