gross anatomy spine Flashcards
what is located in the visceral anterior compartment of the neck
thyroid gland, parathyroid gland, where respiratory and digestive tracts begin
what is located in the visceral neurovascular compartments of the neck (2 lateral)
common carotid artery, IJV, vagus nerve
what is located in the vertebral posterior compartment of the neck
cervical vertebrae and associated muscles
where does air pass through when our mouth is empty
nasal cavity to nasopharynx or oral cavity to oropharynx
where does air pass through when our mouth is full
larynx to trachea to tongue which blocks oropharynx
when we swallow where does the food and air pass through
oral cavity to oropharynx to esophagus to laryngopharynx
what closes in the mouth/throat to block food from going down the trachea
epiglottis
what is the difference between thyroid cartilage and circoid cartilage
thyroid is large and superior, circoid is inferior and circles the airway
what is the purpose of the pharynx
connect oral and nasal cavities to the larynx and esophagus
what are the 3 parts of the pharynx and what is their role
nasopharynx: superior constrictor
oropharynx: middle constrictor
laryngopharynx: inferior constrictor
what is the role of the auricle
capture sound
where does the aucostic meatus end
tympanic membrane
what do the middle ear ossicles transfer sound from
tympanic membrane to inner ear
stimulating what part of the ear may influence the vagus nerve
inner ear
what are the 2 branches of the brachiocephalic
r common carotid and r subclavian
what are the 2 branches of l common carotid
internal and external carotid
what is the primary blood supply to the face
external carotid artery
where is the left subclavian artery found
above first rib, below clavicle
where do the vertebral arteries pass
transverse foramen of cervical vertebrae
where does the internal jugular vein return blood to the heart from
face and cranium
where does the external jugular vein return blood to the
cervical spine
what is the passage of veins from distal to proximal
internal and external jugular, subclavian, brachiocephalic, superior vena cava
what do carotid sinus do
mechanoreceptors that monitor changes to blood pressure
what is carotid sinus innervated by
CN 9
what do carotid body monitor
chemoreceptors, change in blood chemistry
what is carotid body innervated by
CN9 &10
what are the triangles of the neck split by
SCM
anterior triangle contents and borders
A=midline
p=SCM
s=mandible
posterior triangle contents and borders
A=SCM P=trap I=middle 1/3 clavicle S=occiput
anterior triangle CN
7, 10, 11, 12
anterior triangle muscles
submental, submandibular
anterior triangle nodes
thyroid, parathyroid, lymph
anterior triangle vasculature
common carotid artery, IJV
posterior triangle muscles
occipital, omoclavicular, subtriangles, omohyoid, scalene, levator scapula, splenius capitis
CN posterior triangle
11, cervical plexus, phrenic nerve, brachial plexus trunks
posterior triangle vasculature
external jugular vein, subclavian artery, subclavian vein
nerves of cervical plexus
anterior rami (C1-C4)
lesser occipital (C2)
greater auricular (C2-C3)
transverse cervical (C2-C3)
supraclavicular (C3-C4)
cutaneus sensation anterior face/head
trigeminal and facial
posterior head cutaneus sensation
greater occiput, third occipital
lateral/inferior head neck cutaneus sensation
lesser occipital, greater auricular
what does a plexus mean
starts next to the spinal cord and combines into branches to innervate
what are the roots of brachial plexus
C5-T1
what are the trunks of brachial plexus
superior, middle, inferior
what are the divisions of brachial plexus
anterior and posterior; makes an X b/w C6-C7 and a Z b/w C7-C8
what are the cords of brachial plexus
lateral, posterior, medial
what are the terminal nerve branches of brachial plexus
musculocutaneus, axillary, radial, median, ulnar
what nerve roots is each nerve innvervated by
MC: C5-C7
axillary: C5-T1
radial: C5-T1
median: C5-T1
ulnar: C8-T1
brachial plexus branches of nerve roots
dorsal scapular
phrenic
long thoracic
brachial plexus branches of lateral cord
lateral pectoral, musculocutaneus, lateral cutaneus, median nerve
brachial plexus branches of trunks
suprascapular, nerve to subclavius **both coming off of superior trunk
brachial plexus branches of median nerve
medial pectoral, median cutaneus of arm, median cutaneus of forearm, ulnar nerve, median nerve
brachial plexus branches of posterior cord
suprascapular nerve, thoracodorsal, inferior suprascapular, axillary, radial
what is the main nerve for mastication
trigeminal
what are the 3 branches of trigeminal nerve
opthalmic (V1), maxillary (V2), mandibular (V3)
what branch of the trigeminal nerve has some motor function
mandibular (V3)
what landmark divides the branches of the facial nerve
parotid gland
what are the pre-parotid branches of the facial nerve
posterior auricular, digastric
what are the post-parotid branches of the facial nerve
temporal, zygomatic, buccal, marginal mandibular, cervical
muscles of facial expression
orbicularis occuli, occipitofronalis, procerus, hasalis, zygomaticus major and minor, buccinator, levator labril superioris, orbicularis oris, mentalis, platysma
what are the suboccipital muscles
rectus capitis posterior minor, rectus capitis posterior major, obliquus capitis superior and obliquus capitis inferior
what do the obliquus muscles do
keep head in correct position “right” on the body
posterior neck muscle layers
superficial: trapezius
intermediate: splenius capitis and cervicis
deep: spemispinalis capitis: extension and CL rotation of head/neck
what are the muscles of the lateral neck
SCM, scalenes
what muscle usually compensates for neck flexors
SCM
what muscle is very active for chest breathers
scalenes
what muscles attach to the first rib and pass through the brachial plexus
anterior scalenes
what muscle attaches to the second rib and has an extension component
posterior scalene
what are the anterior deep neck flexors
longus capitis, longus colli, rectus capitis lateralis, rectus capitis anterior
what is the anatomical location of anterior deep neck flexors
posterior to esophagus and trachea, anterior to vertebral bodies
4 suprahyoid muscles
digrastric, stylohyoid, geniohyoid, mylonhyoid
what do the suprahyoid muscles assist with
elevation, swallow, chew, speech
what are the infrahyoid muscles
sternothyroid, circothyroid, thyrohyoid, omohyoid
what do the infrahyoid muscles do
assist with depression
c1 vertebrae palpation
no vertebral body so harder, articulates with occpitial condyles
c2 vertebrae palpation
large dens, articlulates with anterior arch of C1, includes transverse ligament
C3-C7 palpation
short vertebral bodies and spinous processes
if the alar ligament is found to have a problem, is it a medical emergency
no it is not
what does the joint b/c C1 and C2 promote
rotation b/c planar joint and no disc b/w
what does the joint between the skull and C1 promote
flexion and extension
what is found in the anterior cranial cavity
frontal bone, ethmoid bone, sphenoid bone
what is found in the middle cranial cavity region
sphenoid bone, temporal bone, parietal bone
what cavity are the pituitary glands found
middle cranial cavity
what is found in the posterior cranial cavity
temporal, parietal, occipital bones
where is the foramen magnum found in the cranial cavities
posterior cranial cavity