Lab 1 Practical

Vertebral foramen

canal through which spinal cord passes

Anterior arch C1 Atlas

Posterior arch C1 Atlas

What does the Facet of Dens on C1 Atlas articulate with?

Dens of C2 Axis to form the atlantoaxial joint

Lateral Mass C1 Atlas

Superior articular surface/facet C1 Atlas

articulates with occipital condyles of the occipital bone and forms the atlanto-occipital joint

Inferior articular surface/facet C1 Atlas

articulates with the superior articular facet of C2 axis

Dens on C2 Axis

articulates with facet of dens on C1 (atlas) to form the atlanto-axial joint

Anterior articular facet of C2 Axis

articulates with posterior surface of anterior arch of Atlas (C1)

Posterior articular facet of C2 Axis

Superior articular facet C2 Axis

articulates with the inferior articular facet of the first cervical vertebra (C1 or atlas)

Superior costal facet of thoracic vertebrae

articulates with head of rib

Inferior costal facet of thoracic vertebrae

Transverse costal facet of thoracic vertebrae

articulates with tubercle of rib

Rhomboid minor

Rhomboid major

Spinotransversales

Medial sternal end of clavicle

Conoid tubercle clavicle

conoid tubercle of clavicle bone

Lateral angle of scapula

Lateral border of scapula

Subscapular fossa

Glenoid cavity

Crest of greater tubercle (lateral lip)

Crest of lesser tubercle (medial lip)

Lateral cord of brachial plexus

Posterior cord of brachial plexus

Medial cord of brachial plexus

Musculocutaneous nerve

C5-C7

Axillary Nerve

C5-C6

Radial Nerve

C5-T1

Median Nerve

C5-T1

Cervical vertebrae

Thoracic vertebrae

Lumbar vertebrae

Sacral vertebrae

Coccyx vertebrae

Vertebral body

Vertebral arch

Pedicle

Laminae

Spinous process

Transverse process

Superior articular process

Inferior articular process

Superior articular notch

Inferior articular notch

Intervertebral foramen

Opening formed by the inferior and superior notches on the pedicles of adjacent vertebrae. Allows passage of spinal nerves and vessels.

Anterior Tubercle C1 Atlas

Posterior Tubercle C1 Atlas

Facet of Dens C1 Atlas

Apex of dens C2 axis

Inferior articular facet C2 axis

articulates with the superior articular facet of the C3 vertebra

Transverse foramen of cervical vertebrae

vertebral arteries travel through

Bifid spinous process of cervical vertebrae

All but C7

Trapezius

Trapezius origin

skull- occipital protuberance

C1-C7- ligamentum nuchae

C7-T12 spinous process

Trapezius insertion

lateral 1/3 of clavicle, acromion, spine of scapula

Trapezius innervation

Accessory nerve (CN XI)

Trapezius action

descending fibers- elevate scapula

transverse fibers- adduct/retract scapula

ascending fibers- depress scapula

Latissimus Dorsi

Latissimus Dorsi origin

T7-T12 spinous process

L1-L5 spinous process

sacrum

iliact crest

Latissimus Dorsi insertion

intertubercular sulcus of humerus

Latissimus Dorsi innervation

Thoracodorsal nerve (C6-C8)

Latissimus Dorsi action

extends, adducts, and medially rotates humerus

Levator Scapulae

Levator Scapulae origin

C1-C4 transverse processes

Levator Scapulae insertion

medial border of scapula

Levator Scapulae innervation

cervical nerve C3 & C4

dorsal scapular nerve C5

Levator Scapulae action

elevate scapula

Rhomboid minor origin

C7-T1 ligamentum nuchae + spinous process

Rhomboid minor insertion

medial border of scapula

Rhomboid major origin

spinous processes of T2-T5

Rhomboid major insertion

medial border of scapula- inferior angle

Rhomboid major innervation

Dorsal scapular nerve (C4, C5)

Rhomboid major action

elevate, adduct (retract) scapula

Serratus Posterior Superior

Serratus Posterior Superior origin

Spinous processes of C7-T3

Serratus Posterior Superior insertion

ribs 2-5

Serratus Posterior Superior innervation

Anterior rami of upper thoracic nerves (T2 to T5)

Serratus Posterior Superior action

elevates ribs 2-5

Serratus posterior inferior

Serratus posterior inferior origin

Spinous processes of T11-L3

Serratus posterior inferior insertion

inferior borders of ribs 9-12

Serratus posterior inferior innervation

Anterior rami of lower thoracic nerves (T9 to T12)

Serratus posterior inferior action

depresses ribs 9-12

Spinotransversales origin

medially, inferiorly

Spinotransversales insertion

laterally and superiorly

Spinotransversales innervation

posterior rami of associated spinal nerve

Spinotransversales action

acting bilaterally-

pull the head posteriorly

extend the neck

acting unilaterally-

turn the head to the same contracting side

Erector Spinae

Erector Spinae origin

medially, inferiorly

Erector Spinae insertion

laterally, superiorly

Erector Spinae innervation

dorsal rami of spinal nerves

Erector Spinae action

acting bilaterally-

pull the head posteriorly

straighten the back, maintain upright position of the trunk

acting unilaterally-

bend the vertebral column laterally

turn the head to the same contracting side

Sternocleidomastoid

Sternocleidomastoid origin

sternal head- upper part of manubrium

clavicular head- superior and medial clavicle

Sternocleidomastoid insertion

mastoid process of temporal bone

Sternocleidomastoid innervation

Accessory nerve (CN XI)

Sternocleidomastoid action

acting bilaterally-

pull the head forward

acting unilaterally-

tilt head to the shoulder

turn the head to the opposite contracting side