Origin and Insertion Flashcards
(220 cards)
Origin and insertion of temporalis ?
Origin:Temporal fossa
Insertion: Coronoid fossa, ramus of the mandible
What are the functions of the temporalis?
Elevation of mandible
Retraction of mandible (sec)
Origin and insertion of the masseter?
Origin: Inferior margin of both zygomatic bone and zygomatic arch of the temporal bone
Actions of masseter?
Elevation of mandible
Protraction of mandible (sec)
Retraction of mandible (sec)
What nerve innervates the masseter?
Trigeminal nerve (mandibular division)
Origin and insertion of lateral pterygoid?
Origin: Sphenoid bone
Insertion: Mandible and the temperomandibular joint (TMJ)
What are the actions of the lateral pterygoid?
Protraction of mandible
Contralateral deviation of mandible (sec)
Which nerves innervates the lateral pterygoid?
Trigeminal nerve (CN V)
Origin and insertion of the medial pterygoid?
Origin: Sphenoid bone
Deep head –> process of the sphenoid, the palatine bone, and the tuberosity of the maxilla
Superifical head –> The palatine bone and the maxilla Insertion: Internal surface of the mandible
The muscles of the scalp are innervated by which nerve?
Facial nerve (CN VII)
The muscles of facial expression are innervated by which nerve?
Facial nerve (CN VII)
The muscles of mastication are innervated by which nerve?
Trigeminal nerve (CN V)
What are the 3 muscles of the scalp?
Occipitofrontalis, temperoparietalis, auricularis
What are the muscles of the eye?
Orbicularis oculi, levator palpebrae superior, corrugator supercilii
What are the muscles of the nose?
Procerus, nasalis, depressor septi nasi
What are the muscles of the mouth?
Levator labii superior alaeque nasi, levator labii superioris, zygomaticus minor, zygomaticus major, levator anguli oris, risorius, depressor anguli oris, depressor labii inferioris, mentalis, buccinator, orbicularis oris
What are the muscles of mastication?
Temporalis,
lateral pterygoid,
medial pterygoid,
masseter
Origin and insertion of the anterior scaleni?
Origin: Anterior tubercles of processus transversi C3-C6
Insertion: 1st rib
Actions of anterior scalene?
Flexion of neck
Lateral flexion of neck
Elevation of 1st rib
Contralateral rotation of neck (sec)
Origin and insertion of middle scalene?
Origin: Posterior tubercles of the processus transversi of C2-C7
Insertion: 1st rib
What are the function of the middle scalene?
Lateral flexion of neck,
flexion of neck,
elevation of the 1st rib
Origin and insertion of the posterior scaleni?
Origin: Posterior tubercle of processus transversi C5-C7
Insertion: 2nd rib
Actions of the posterior scaleni?
Lateral flexion of neck
Elevation of the 2nd rib
Origin and insertion of posterior digastric?
Origin: Mastoid notch of temporal bone
Insertion: Hyoid bone