Cervical triangles & Contents Flashcards
no notes on the arteries in this section notes up to S33 (done at corner bakery)
The cervical plexus is formed from ____
VR of C1-C4
The cervical plexus runs in relation to the _____V.
internal Jugular V.
Name the 4 Sensory branches of the cervical plexus
lesser occipital
greater auricle
transverse cervical
supraclavicular
Root of the lesser occipital
C2
What does the lesser occipital N. (C2) innervate
skin of the neck and scalp (post./ sup) to the auricle
Sensory innervation for the skin of the neck and scalp (post./ sup) to the auricle ?
Lesser occipital (C2)
Sensory innervation that supplies the skin over the parotid gland
Greater auricle (C2,C3)
Sensory innervation of the skin over the mastoid process
Greater auricle (C2,C3)
Sensory innervation for the skin over the auricle
Greater auricle (C2,C3)
Sensory innervation for the skin extending from the mandible to the mastoid process
Greater auricle (C2,C3)
Branch of the cervical plexu that arises from the anterior rami of C3-C4
Supraclavicular N
Sensory innervation of the clavicle and over the shoulder
Supraclavicular N (C3-C4)
Nerve root of the supraclavicular N
C3,C4
Nerve root of the great auricle
C2,C3
Nerve root of the transverse cervical
C2,C3
Sensory innervation of the anterior cervical region
Transverse cervicle
Root of the motor innervation for the SCM from the cervical plexus
C2,C3
Root of the motor innervation for the Levator Scap
C3,C4
Root of the motor innervation of the trapezius from the cervical plexus
C3,C4
What muscles make up the infrahyoid muscles (4)
- thyroid
- omohyoid
- Sternohyoid
- Sternothyroid
Motor innervation to the infrahyoid muscles
ansa cervicalis (C1-C3)
Motor innervation to the thyrohoid
Ansa Cervicalis (C1-C3)
Motor innervation to the omohyoid
ansa cervicalis (C1-C3)
Motor innervation to the sternohyoid
ansa cervicalis (C1-C3)
Motor innervation to the sternothyroid
Ansa Cervicalis (C1-C3)
What two roots make up the ansa cervicalis
Superior root (C1) Inferior root (C2,C3)
branch from C1 that joins the hypoglossal N and then separates to form the _____
superior root
Branch from C1 joins the ______ N and then separates to form the superior root that later forms the ____
hypoglossal N
Ansa Cervicalis
The inferior root is made up of the descending cervical N which carries ___ &___
C2, C3
The phrenic arises from ____
C3,C4,C5 (keep the diaphragm alive)
Nerve innervation of the platysma M
Facial N (CN 7)
Nerve innervation for the SCM
Accessory N (CN 11) C2,C3
Nerve innervation for the ant. Scalene
VR. C4-C6
Nerve innervation for the middle scalene
C3-C8
Nerve innervation for the posterior scalene
VR of C6-C8
Action of the platysma M
depresses mandible
draws lower lip & angle of mouth
Action of the SCM
Bilat: EXTENDS head at the atlanto-occipital joint
Unilat: bends the neck
Ipsi: rotates head contralaterally
Which scalene also rotates the neck
ant. scalene
Which scalene elevates Rib 2
Posterior scalene
Origin of the Anterior scalene
TP of C3-C6
Origin of Middle scalane
TP C2-C7
Origin of the Post. scalene
C4-C6
Boundaries of the posterior triangle
Ant- SCM
post- Trap
Inf- middle 1/3rd of the clavicle
4 art. that run through the post. triangle
subclavian
superficial (transverse cervical )
Suprascapular
Occipital art
2 veins that run through the post triangle
ext. jugular
subclavial v
3 nerves that run through the post. triangle
brachial plexus
cervical plexus
CN 11 accessory
What are the two subdivision (triangles) within the post. triangle
occipital triangle & SUBclavicular triangle
Boundaries of the occipital triangle
SCM
Inf. belly of the omohyoid
Trap
Boundaries of the subclavicular triangle
SCM
inf. belly of the omohyoid
middle third of the clavicle
origin of the platysma M
deep fascia covering the pec major and deltoid M
Insertion of the platysma M
Lower margin of the mandible
Origin of the SCM
Manibrium
medial 1/3rd of the clavicle
Insertion of the SCM
mastoid process
What 4 muscles make up the suprahoid muscle group
mylohoid
geniohyoid
stylohyoid
digastric
Origin of digastric
posterior belly: mastoid process
Insertion: anterior belly- digastric fossa of the mandible
Insertion of the digastric M
Anterir belly: digastric fossa of the mandible
Origin: post belly- mastoid process
Action of the digastric M
chewing- depresses the mandible
Swallowing- elevates the hyoid bone
Innervation of the digastric M
Post belly- Facial N
Ant belly- N. to mylohoid
origin of the Stylohyoid M
styloid process
insertion: hyoid bone at the jxn of the body and greater cornu
Insertion of the stylohoid M
hyoid bone at the jxn of the body and greater cornu
Origin: styloid process
Action of the stylohoid M
Elevates the hyoid bone
Innervation of the stylohoid M
facial N
Origin of the mylohoid M
Myolohyoid line of the mandible
insertion: Hyoid bone, raphe
Insertion of the myohoid M
Post: hyoid
Ant: raphe, that extends from symphysis menti to the body of the hyoid
origin myohoid line of the mandible
Action of the myohoid M
elevates hyoid when mandible is fixed
depresses mandible when hyoid is fixed
Innervation of the myohoid M
myohyoid N (a branch of the inferior alveolar N )
Myohoid N is a branch of the _____N
inferior alveolar N
Origin of the geniohyoid M
Inf. Mental spine of the mandible
insertion: hyoid bone
Insertion of the geniohyoid M
hyoid bone
Origin: inferior mental spine of the mandible
Action of the geniohyoid M
Fixed mandible: elevates and pulls forward the hyoid
Fixed hyoid: depresses mandible
Innervation of the geniohyoid M
Ant. ramus of C1
C1 is carried by the hypoglossal N
4 muscles that make up the infrahyoid Muscle group
omohyoid
sternohyoid
sterothyroid
thyrohyoid