Anatomy Flashcards
Pituitary gland sits in what hollow
hypophyseal fossa (in sphenoid bone)
Pituitary gland is connected to the hypothalamus via what
pituitary stalk (infundibulum)
optic chiasm is where in relation to pituitary gland
superior
Pituitary gland has 2 lobes
anterior lobe (adenohypophysis)
posterior lobe (neurohypophysis)
Anterior pituitary stains … whereas posterior pituitary stains …
dark
pale
Anterior pituitary made up of 3 types of cells
Acidophilic - stain pink
Basophilic - stain light purple
Chromphobic - don’t stain much, just pale
2 types of acidophils
somatotrophs - generate somatotropin (also known as growth hormone)
mammotrophs - generate prolactin
3 types of basophils
Corticotrophs - secrete ACTH and MSH
Thyrotrophs- secrete TSH
Gonadotrophs - secrete FSH and LH
Main secretory cells of the AP are acidophils and basophils; what are the secretory cells in the PP
nerve cells
Arterial supply of the pituitary gland (2)
Branches of ICA
- superior hypophyseal artery - supplies AP
- inferior hypophyseal artery - supplies PP
Venous drainage of the pituitary gland
hypophyseal veins into the cavernous sinus
3 strap muscles that overlie the thyroid gland
Sternohyoid
Sternothyroid
Omohyoid
2 nerves that supply the muscles of the vocal cord
Recurrent laryngeal - between trachea and oesophagus
External laryngeal
Arterial supply of the thyroid gland (2)
Superior and inferior thyroid artery (branches of ECA and thyrocervical trunk respectively)
Venous drainage of the thyroid gland
Superior, middle and inferior thyroid veins
Thyroid gland sits anterior to what
trachea
Surface marking of thyroid gland
Inferior to thyroid cartilage
During thyroid surgery, care must be taken to not damage what nerve
recurrent laryngeal - as it passes underneath they thyroid gland to innervate the larynx