Intrinsic back And Neck Muscles Flashcards
What are all intrinsic muscles of the back innervated by
Posterior primary division of the spinal nerves
In the superficial layer of the neck which two muscles can be found
Splenius capitis and Splenius cervicis
This muscle originates at the Lower ligamentum nuchae SP of T1-T3 and inserts at the mastoid process
Splenius capitis
This muscle originates at the SP of T3-T6 and inserts on the TP of C1-C3
Splenius Cervicis
When Splenius capitis and Cervicis act alone what action occurs
The next is rotated to the side of contraction
When Splenius capitis and cervicis contract together what action occurs
the head is drawn back
The Iliocostalis is the
Most lateral column of intermediate muscles
Where does the iliocastalis muscles originate from and insert to
Origainate on the iliac crest and insert on the ribs
The longissimus muscles can be found
In the intermediate column, running between TPs
The Spinalis muscles can be found
Most medial to the spine, running between spinous process
what are some of the actions of the erector spinae group
Bilaterally extend column, assist in breathing, bend the column laterally
The Rotators are the
Deepest transversospinous muscle
Rotators are divided into short and long, how can they be differentiated
Short: run from a TP to a vertebrae SP one segment higher
Long: run from a TP to a vertebrae SP two segments higher
The multifidus muscles run from
A TP to a Vertebrae SP 2-5 segments higher
What are the 3 semispinalis muscles found above T10
Semispinalis Thoracis (T1-T4)
Semispinalis cervicis (insert on C2 Sp)
Semispinalis capitis (inserts on occipital bone)
The interspinalis muscles are found between the spinous processes of adjacent vertebrae. What action do these muscles create and where are they best developed
Create the action of extension between transverse processes of adjacent vertebrae. Are best developed in invertebral column
The intertransversarii are found in the cervical region and create the action of
Extending the column and bending towards the same side
Which 2 suboccipital muscles origianate on the SP of C2
rectus capitis posterior major, obliquus capitis inferior,
Obliquus capitis superior a suboccipital muscle that doesnot origanite at the SP of C2. Where does this muscle originate
TP of C1
Which muscles make up the suboccipital triangle and what structures run through this triangle
Obliquus capitis superior, obliquus capitis inferior, rectus capitis posterior major.
Suboccipital nerve and vertebral artery pass through
All of the anterior muscles are innervated by ___ and have the action of
Innervated by ventral primary rami of cervical nerves
Flex the head and neck
The longs Colli muscle extends from
Anterior tubercle of atlas to body of T3
The longus capitis muscles originates on the TP of C3-C6 and will insert on
Occipital bone
The rectus capitis anterior attaches on the occipital bone, where does it originate form
lateral mass of Atlas
The rectus capitis lateralis muscles runs from
TP of atlas to the occipital bone
The anterior scalene muscle inserts on the
Scalene tubercle and first rib
What is the action of anterior scalene
Elevation of first rib
What nerves innervate anterior scalene
C4-C6
The middle scalene originates on the postieor tubercle of TP C2-C7, where does it insert
Upper surface of ribs 1,2
What is the action of middle scalene
elevation of ribs 1,2
What is the innervation of middle scalene
C3-C8
The Posterior scalene muscle inserts on Outer surface of rib 2, where does it originate
Posterior tubercle of C5-C7
All of the scalene muscles receive vasculature from
Ascending cervical artery
The general action of suprahyoids is to
Depress the mandible
The general action of infrahyoids is to
Stabilize the hyoid
What are the 4 muscles in the suprahyoid group
Digastric, gleniohyoid, stylohyoid, mylohyoid
The digastric muscle features an anterior and posterior belly. Where does this muscle originate and insert
Originates at the mandible (anterior) and Mastoid process (posterior). Muscle inserts at the intermediate tendon
The anterior belly of the digastric is innervate by
CN 5 V3
The posterior belly of digastric is innervated by
CN 7 Facial
The geniohyoid is the deepest suprahyoid that inserts on the hyoid. Where does the muscle originate
Genial spine
C1 via the Hypoglossal nerve innervates which suprahyoid
Geniohyoid
The stylohyoid insets on the hyoid, where does the muscle originate
Styloid process
Which cranial nerve innervates stylohyoid
CN 7 (facial)
The mylohyoid is the most superficial suprahyoid muscle that inserts on the hyoid. Where does the muscle originate
Mylohyoid line of mandible
Which cranial nerve innervates hte mylohyoid muscle
Cn5 V3
The sternohyoid muscle runs from the
Clavicle to hyoid
The sternothyroid muscle runs from
Manubriuum to thyroid
The sternohyoid and sternothyroid are innervated by
Ansa cervical is
The thyrohyoid runs from
Thyroid cartilage to hyoid
Which cranial nerve innervates the thyrohyoid
C1 via the CN 12
The omohyoid features a superior and inferior belly. Where does the superior belly run
From intermediate tendon to hyoid
The omohyoid has a superior and inferior belly. Where does the inferior belly run
From superior angle of scapula to intermediate tendon
rectus capitis posterior minor is the only suboccipital muscle to not be included in the suboccipital triangle. Where does this muscle originate
Posterior tubercle of C1
The longus colli muscle attaches to the bodies of vertebrae between ___ and ___
TPs and C3-C6
