Head Neck Thorax Abdomen Flashcards
Temporalis
Origin: Temporal Fossa of Parietal bone
Insertion: Coronoid Process of the Mandible
Innervation: V3 Mandibular Nerve
Function: Mastication
Medial Pterygoid
Origin: Deep head - medial side of lateral pterygoid plate
Superficial head - pyramidal process of th palatine
Insertion: Medial Angle of Mandible
Innervation: Mandibular Branch of CN5 Trigeminal
Function: elevates mandible, closes jaw (mastication)
Mylohyoid
Origin: Inferior Mental Spine line on the mandible
Insertion: Inferio
Innervation: V3 mandibular
Function: Elevation of hyoid (swallowing)
Steronohyoid
Origin: hyoid bone
Insertion: manibrium of sternum
Innervation: Ansa Cervicalis (C1-C3) superior branch
function: depresses the hyoid (swallowing)
Trapezius
origin: spinous processes of vertebrae C1-T12
insertion: superior fibres- external occipital protuberance, nuclei line of occipital bone
Middle fibres - lateral 1/3 of scapula
inferior fibres - acromion and spine of scapula
Innervation: Accessory nerve
Function: Rotation, retraction, depression and elevation of the scapula
Pectoralis major
Origin: Clavicular head - anterior border of medial part of clavicle
Insertion: inter tubercular groove of humerus
Innervation: Lateral and Medial pectoral nerves
Function: Adducts and medially rotates the humerus
Stylohyoid
Origin: Styloid process
Insertion: Hyoid
Innervation: CN 7 Facial
Function: Elevates hyoid (swallowing)
Trapezius
Origin: Spinous processes of vertebrae C1- T12
Insertion:
superior fibres - Exernal occipital protuberance (occipital bone), lateral 1/3 of clavicle
Middle fibres - acromionof scapula
inferior fibres - spine of scapula
Innervation: Accessory Nerve
Function: Rotation, elevation and depression of the scapular
Pectoralis Minor
Origin: third to fifth ribs
Insertion: Coracoid process of scapula
Nerve: Medial pectoral nerve
Function: Inspiration
Mylohyoid
Origin: mylohyoid line on the mandible
Insertion: Hypoid bone
Nerve: V3 Mandibular
Function: Elevation of the hyoid (swallowing) and tongue
Sternocleiomastoid
origin: manibrium of clavicle
insertion: mastoid process of the temporal bone
Nerve: Motor- CN11 Accessory Nerve
Sensory- Cervical Plexus C1-C4
Function:
Unilaterally - cervical rotation to opposite side
Bilaterally - cervical flexion
Geniohyoid
Origin: inferior mental spine (genial tubercle) on mandible
Insertion: Hyoid bone
Nerve: C1
Function: elevates hyoid bone, swallowing
Digastric
Origin: Anterior belly- diagastric fossa of the mandible
Posterior belly - mastoid process of temporal bone
Insertion: intermediate tendon on hyoid bone
Nerve:
Function: Anterior belly: V3
Posterior belly: V7
Function: Opens the Jaw
Sternothyroid
Origin: manibrium of sternum
Insertion: thyroid cartilidge
Nerve: Ansa Cervicalis
Function: Depresses the thyroid cartilage
Thyrohyoid
Origin: Thyroid cartilidge
Insertion: Hyoid bone
Nerve: Ansa Cervicalis
Funciton: Elevates the thyroid and depresses the hyoid
Omohyoid
Origin: Upper border of the scapula
Insertion: Hyoid Bone
Nerve: Ansa Cervicalis
Function: Depresses hyoid bone, Also carries hyoid backwards and to the side
Masseter
Origin: Zygomatic arch of Maxilla
Insertion: Ramus of mandible
Nerve: Mandibular V3
Function: Retraction of mandible, elevation of mandible (closing the mouth)
Epicranius or occipialfrontalis (fronal belly)
Origin: Gala Apaneurotica
Insertion: Orbicularis occuli
Nerve: Facial CN7
Actions: Raises eyebrows, wrinkles forehead
Epicranius or occipitalfrontalis (occipital belly or occipitalis muscle)
Origin: Superior Nucal line on occipital bone, mastoid process of the temporal bone
Insertion: Gala aponeurotica
Nerve: CN7
Actions: Moves the scalp back
Procerus
Origin: Nasal bone
Insertion: Skin between the eyebrows
Nerve: CN7
Action: Frowing