Anat Lab 5

Front 1

Thyroid Gland
-Located at

Back 1

vertebral levels C5-T1

Front 2

Laterally the thyroid gland is in contact with

Back 2

the carotid sheath

Front 3

Right and Left lobes connected by

Back 3

the isthmus

Front 4

Thyroid Gland Vasculature

Back 4

Superior Thyroid Artery
-Inferior Thryroid Artery
Thyroidea ima artery
The superior and middle thyroid veins

Front 5

Superior Thyroid Artery: It is a branch of the

Back 5

external carotid artery. It pierces the superior end of the thyroid gland

Front 6

Inferior Thryroid Artery: It’s a branch of the

Back 6

thyrocervical trunk

Front 7

When present, the thyroidea ima artery enters the thyroid gland from

Back 7

inferiorly, near the midline

Front 8

The superior and middle thyroid veins are tributary to the

Back 8

internal jugular vein.

Front 9

The right and left inferior thyroid veins drain into

Back 9

the right and left brachiocephalic veins, respectively

Front 10

Posterior to the thyroid lobe, in the groove between the trachea and esophagus, we find the recurrent

Back 10

the recurrent laryngeal nerves

Front 11

what to do To maintain proper serum calcium levels after thyrodectomy?

Back 11

at least one parathyroid gland must be retained during surgery

Front 12

Root of the neck is the junction between

Back 12

the thorax and the neck, just superior to the superior thoracic aperture.

Front 13

The only tributary to subclavian vein.

Back 13

External jugular vein

Front 14

Subclavian vein- begins at lateral margin of rib 1 as continuation of

Back 14

axillary veins

Front 15

Thoracic duct – joins the venous system at

Back 15

junction of left subclavian vein and left internal jugular vein (Left venous angle)

Front 16

Right lymphatic duct – joins venous system at

Back 16

Right venous angle

Front 17

Right recurrent laryngeal nerve branches off right vagus nerve as it passes anterior to the

Back 17

subclavian artery

Front 18

right recurrent laryngeal nerve travels along

Back 18

along lateral surface of trachea and esophagus up to larynx

Front 19

Left recurrent laryngeal nerve – branches off left vagus nerve as it passes

Back 19

the left side of the aortic arch. Travels along lateral surface of trachea and esophagus up to larynx

Front 20

phrenic nerve passes anterior to

Back 20

anterior scalene muscle

Front 21

inferior cervical sympathetic ganglion is located at

Back 21

at root of the neck

Front 22

Cervical sympathetic trunk is continuous with

Back 22

thoracic sympathetic trunk. Will be studied in depth later!

Front 23

Upper trunk
Middle trunk
Lower trunk composed of

Back 23

C5-C6.
C7-C8
C8-T1

Front 24

Interscalene triangle - Formed by

Back 24

borders of rib 1, anterior scalene and middle scalene (which both attach to rib 1).

Front 25

- Subclavian vein, suprascapular artery, transverse cervical artery pass anterior to

Back 25

anterior scalene m.

Front 26

Axillary a. 1st part

Back 26

from origin to medial border of anterior scalene muscle. Has 3 branches:
Vertebral artery
Internal thoracic artery
Thyrocervical trunk
Suprascapular artery
Transverse cervical artery

Front 27

Internal thoracic artery – supplies

Back 27

ant. thoracic wall, arises from anteroinferior surface of subclavian a.

Front 28

Suprascapular artery - passes laterally and posteriorly, supplies

Back 28

supraspinatus/infraspinatus mm. Lowest branch of these 3

Front 29

Transverse cervical artery – passes laterally, crosses deep to the omohyoid m and superior to the clavicle,

Back 29

supplies trapezius

Front 30

Inferior thyroid artery – passes medially toward thyroid glands posterior to the cervical sympathetic trunk. Supplies

Back 30

thyroid gland. Has 1 branch:
Ascending cervical artery – supplies prevertebral mm. and gives branches to supply spinal cord

Front 31

2 part of axillar aa

Back 31

Costocervical trunk
1-Deep cervical artery
2

Front 32

deep cervical l artery

Back 32

ascends in back of neck, anastomoses with descending branch of occipital artery, gives branches to supply spinal cord

Front 33

Supreme intercostal artery – gives rise to

Back 33

posterior intercostal aa. 1 and 2

Front 34

3 part of axillary

Back 34

: lateral border of anterior scalene muscle to lateral border of the rib 1. Has 1 branch.
Dorsal scapular artery – passes between superior and middle trunks of brachial plexus, supplies muscles of scapular region. (note: may arise from transverse cervical 30% of the time, but not in our body)