-
Rectus Capitis Posterior Minor
- Origin: Tubercle on posterior arch of atlas
- Insertion: Medial part of inferior nuchal line of occipital bone
- Action: Extension of neck
- Innervation: Suboccipital n.: C1
-
Rectus Capitis Posterior Major
- Origin: Spinous process of axis
- Insertion: Lateral part of inferior nuchal line of occipital bone
- Action: Extension, lateral flexion, ipsilateral rotation of neck
- Innervation: Suboccipital n.: C1
-
Obliquus Capitis Superior
- Origin: Superior surface of transverse process of atlas
- Insertion: Between superior and inferior nuchal lines of occipital bone
- Action: Extension, lateral flexion of neck
- Innervation: Suboccipital n.: C1
-
Obliquus Capitis Inferior
- Origin: Apex of spinous process of axis
- Insertion: Inferoposterior part of transverse process of atlas
- Action: Ipsilateral rotation of neck
- Innervation: Suboccipital n.: C1
-
Longus Capitis
- Origin: Anterior tubercles of transverse processes of third through sixth cervical vertebrae
- Insertion: Inferior surface of basilar part of occipital bone
- Action: Flexion, ipsilateral rotation of neck
- Innervation: C1, 2, 3
-
Longus Colli, Superior oblique portion
- Origin: Anterior tubercles of transverse processes of third through fifth cervical vertebrae
- Insertion: Tubercle on anterior arch of atlas
- Action: Flexion, lateral flexion, ipsilateral rotation of neck
- Innervation: C2-7
-
Longus Colli, Inferior Oblique portion
- Origin: Anterior surface of bodies of first two or three thoracic vertebrae
- Insertion: Anterior tubercles of transverse processes of fifth and sixth cervical vertebrae
- Action: Flexion, lateral flexion, ipsilateral rotation of neck
- Innervation: C2-7
-
Longus Colli, Vertical portion
- Origin: Anterior surface of bodies of first three thoracic and last three cervical vertebrae
- Insertion: Anterior surface of bodies of second through fourth cervical vertebrae
- Action: Flexion, lateral flexion, ipsilateral rotation of neck
- Innervation: C2-7
-
Rectus Capitis Anterior
- Origin: Root of transverse process; anterior surface of atlas
- Insertion: Inferior surface of basilar part of occipital bone
- Action: Flexion, ipsilateral rotation of neck
- Innervation: C1, 2
-
Rectus Capitis Lateralis
- Origin: Superior surface of transverse process of atlas
- Insertion: Inferior surface of jugular process of occipital bone
- Action: Lateral flexion of neck
- Innervation: C1, 2
-
Sternocleidomastoid
- Origin:
- Medial/Sternal Head - Cranial part of manubrium sterni
- Lateral/Clavicular Head - Medial 1/3 of clavicle
- Insertion: Lateral surface of mastoid process; lateral 1/2 of superior nuchal line of occipital bone
- Action: Extension, flexion, lateral flexion, contralateral rotation of neck
- Innervation:
-
Scalenus Anterior
- Origin: Anterior tubercles of transverse processes of third through sixth cervical vertebrae
- Insertion: Scalene tubercles and cranial crest of first rib
- Action: Flexion, lateral flexion, contralateral rotation of neck
- Innervation: Lower cervical nn.
-
Scalenus Medius
- Origin: Posterior tubercles of transverse processes of second through seventh cervical vertebrae
- Insertion: First rib, cranial surface between tubercle and subclavian groove
- Action: Lateral flexion, contralateral rotation of neck
- Innervation: Lower cervical nn.
-
Scalenus Posterior
- Origin: By two or three tendons from posterior tubercles of transverse processes of last two or three cervical vertebrae
- Insertion: Outer surface of second rib
- Action: Lateral flexion, contralateral rotation of neck
- Innervation: C6-8
-
Trapezius, Upper
- Origin: External occipital protuberance, medial 1/3 of superior nuchal line, ligamentum nuchae, and spinous process of seventh cervical vertebra
- Insertion: Lateral 1/3 of clavicle; acromion process of scapula
- Action: Extension, lateral flexion, contralateral rotation of neck
- Innervation: Accessory, CN XI; C3-4
|
|
