Head, Neck and Vertebral Column Nerves, Vessels and Regions Part 2 Flashcards
Which subdivision of the anterior triangle contains the
- common carotid artery
- internal jugualr vein
- hypoglossal
- vagus nerves
carotid triange
What muscle supports and elevates the floor of mouth; & elevation of hyoid
Mylohoid Muscle
what is the function of diagastric muscles>
opens mouth by lowering mandible and raises hyoid bone
give the 2 origins, insertion and innervation of the diametric muscles?
ORIGIN
- ANT BELLYl; diagastric fossa on lower inside mandible
- PB; mastoid notch on med side of mastoid prices of temp bone
INSERION: att of tendon btw 2 bellies of body of HB
INNERVATION:
Ant belly= mylohyoid nerve from inf alveolar branch of mandibular V3
post belly= facial nerve VII
give original, insertion and innervation of mylohyoid muscles
mylohyoid line on mandible–> bod of HB and fibres from muscle on pop side
INNERVATIONl: mylohyoid nerve from inferior alveolar branch of mandibular nerve [V3}
what muscles are innervated by the mylohyoid nerve from inferior alveolar branch of mandibular nerve [v3]
posteiror belly of digastric muscle and mylohyoid muscle
Where is the facial artery and vein contained?
submandibular triangle
what does the submittal triangle contain?
submental lymph nodes
what is contained within the muscular triangle?
infrahyoid muscles, pharynx, thyroid and parathyroid glands
which subdivision of anterior triangle contains no vessels?
muscular
what is contained within the carotid triangle>?
- common carotid artery
- internal jugilar vein
- hpoglossal and vagus nerves
name the 8 muscle sin the posterior triangle of neck
- sternocleidomastoid
- trapezius
- splenius capitis
- levator scapular
- post scalene
- middle scalene
- anterior scalene
- omohyoid
give the function of the sternocleidomastoid muscle
- individually will tilt head toward shoulder on same side
rotating head to turn face to pop side
- acting together draw head forwards
what is the function of trapezius?
assist in rotating scapula during abduction of hummus above horizontal;
upper fibers elevate
middle fibres adduct
lower depress scapula
Give 2 origins and inserions of the sternocleidomastoid muscle
STERNAL HEAD:
upper part ant surface of manubrium of sternum–> lat 1/2 nsupeiror nuchal line
CLAVICULAR HEAD
sup surface of medial 1/3 clavicle–? lat surface of mastoid process
What is the innervation of SCM and trapezius muscle
SCM= accessory nerve [XI] branches from ant rami of C2 -C3 (C4)
TRAPEZIUS= motor accessory nerve [XI] proprioception C3 and C4
what are subdivisions of posterior triangle and what divides it?
OMOHYOID MUSCLES splits PT into two
- OCCIPITAL TRIANGLE: larger ,superior
- SUBCLAVIAN: contains distal portion of subclavian artery
muscles in the posterior triangle
- OMOHYOID MUSCLE
2. VERTEBRAL M (splenius capitis, levator scapulae, ant, mid, post scalene)
vessels in the posterior triangel
- EJV joins with SUBCLAVIAN VEIN
2. SUBCLAVIA VEIN, transverse cervical and suprascapualr veins and arteries
nerve in posterior triangle
- accessory nerve (CN XI)
2, cervical plexus forms within the muscle of the floor of posterior triangle - phrenic nerve
- trunks fo brachial plexus also cross the floor of posterior triangle
arterial supply of thyroid ?
- superior infeiror thyroid artery
venous drainage of thyroid gland
sup mid inf thyroid vein
where does parotid duct opens adjacent to?
crown of the 2nd upper molar
what doe the parotid gland enclose?
- external carotid artery,
- retromandibular vein
- facial nerve (VII)
how is venous drainage achieved in parotid gland?
via retromandibular vein
innervation of parotid gland
V3 and CNIX
