anatomy neck muscles Flashcards
sternocleidomastoid muscle
nerve
spinal accessory nerve
splenius capitis muscle
nerve
posterior ramus of spinal nerves C3 and C4.
Longus Capitis Muscle
nerve
anterior rami of spinal nerves C1-C3.
temporalis muscle origin insertion nerve function
temporal fossa
coronoid process
mandibular nerve
retracts mandible
INFRAHYOID MUSCLES
omohyoid
nerve
blood supply
anterior rami of c1-c3 spinal nerves via asna cervalisis
inf thyroid artery
sternohyoid
nerve
blood supply
anterior rami of C1-C3 via ansa cervicalis
sup thyroid artery
sternothyroid
nerve
blood supply
anterior rami of C1-C3 via ansa cervicalis
sup thyroid and lingual arteries
thyrohyoid
nerve
artery
anterior ramus of spinal nerve C1 via CNVII
sup thyroid and lingual arteries
SUPRAHYOID MUSCLES
stylohyoid
nerve
action
stylohyoid branch of facial nerve
initiates swallowing
geniohyoid
nerve
action
C1 nerve along w CNXII
elevates hyoid and depresses mandible
mylohyoid
nerve
action
inferior alveolar branch of mandibular nerve
elevates hyoid and floor of mouth
digastric : anterior belly
nerve
action
inferior alveolar branch of mandibular nerve
elevates hyoid and depresses mandible
digastric posterior:
nerve
action
digastric branch of facial nerve
elevates hyoid bone and depresses mandible
OTHER MUSCLES
sternocleidomastoid muscle
origin
insertion
Sternal head :manubrim of sternum
Clavicular head :medial third of clavicle.
mastoid process and superior nuchal line
Splenius capitis Muscle
origin
insertion
nuchal ligament and spinous process of C7-T3
mastoid process
Longus Capitis Muscle
origin
insertion
anterior tubercle of transverse processes of C3-C6.
basilar part of occipital bone.
omohyoid
origin
insertion
- transverse scapular lig and sup border of scapula
- hyoid bone
sternohyoid
origin
insertion
- manubrium of sternum , medial end of clavicle
- hyoid bone
sternothyroid
origin
insertion
post surface of manubrium , costal cartilage of rib 1
oblique line of thyroid cartilage
thyrohyoid
origin
insertion
- oblique line of thyroid cartilage
- hyoid
stylohyoid
origin
insertion
styloid process
hyoid bone
mylohyoid
origin
insertion
mylohyoid line of mandible
hyoid bone
geniohyoid
origin
insertion
inf mental spine of mandible
hyoid
digastric : anterior belly
origin
insertion
digastric fossa of mandible
intermediate tendon , attached to hyoid bone by fibrous sling
medial pterygoid muscle
origin
insertion
-superficial part=tuberosity of maxilla , pyramid process of palatine
deep part=. medial surface of lat pterygoid plate
-ramus and angle of mandible
digastric posterior:
origin
insertion
mastoid process of temporal bone
intermediate tendon , attached to hyoid bone by fibrous sling
lateral pterygoid muscle INFERIOR HEAD
origin
insertion
infratemporal crest of greater wing of sphenoid bone
joint capsule of TMJ
lateral pterygoid muscle
origin
insertion
nerve and blood
-lateral pterygoid plate
-pterygoid fovea of neck of condylar process of mandible
same as inferior head
medial pterygoid muscle
origin
insertion
-superficial part=tuberosity of maxilla , pyramid process of palatine
deep part=. medial surface of lat pterygoid plate
-ramus and angle of mandible
masseter muscle
origin
insertion
superficial=maxillary process of zygomatic bone, inf border zygo arch
deep=deep/inf surface of zygomatic arch
ramus and angle of mandible
