Pituitary Gland Flashcards
What is the name given to the depression in the skull where the pituitary gland sits?
Turcica
In the body of which cranial bone is Turcica?
Sphenoid
In the body of which cranial bone is Turcica?
Sphenoid
How is the optic chiasm related to the pituitary gland?
Sits on top of it
All fibres from eye pass through where to get to optic chiasma
Optic Nerve
At the optic chiasma the medial nasal fibres cross to which side
Opposite
At the optic chiasma the medial nasal fibres cross to which side
Opposite
The optic tract contains fibres from
Lateral Temporal half of Ipsilateral Eye
Crossed over nasal fibres from contralateral eye
Fibres from optic tract synapse at
LGB of Thalamus
Optic Radiation passes behind the
Internal Capsule to reach Primary Visual Cortex in Occipital Lobe (Area 17)
The Primary Visual Cortex is found where
Occipital Lobe (Area 17)
The Right Visual Cortex sees which half of visual field
Left Half
The Left Visual Cortex sees which half of visual field
Right
If the right optic nerve is damaged what do you expect to see
Blindness in One Eye
What do you expect to see when Optic Chiasma is disrupted in middle?
Bitemporal Hemianopia
What do you expect to see when Right Optic Tract is damaged
Contralateral homonymous Hemianopia
What do you expect to see when optic radiation is damaged
Contralateral Homonymous Hemianopia
The Pituitary Gland is connected to Hypothalamus by
Pituitary Stalk
The anterior pituitary develops from
Branchial Arteries
Which is the larger of the two pituitary lobes?
anterior
Which of the two pituitary lobes is glandular and manufactures numerous hormones?
Anterior
What is the function of posterior lobe of pituitary?
To release hormones after input from nervous system – releases neurohormones produced in hypothalamus
The anterior pituitary stains what colour
Dark
The posterior Pituitary stains
Pale
The anterior pituitary has what type of cells
Acidophilic
Basophilic
Chromophobic
Acidophilic cells stain
Pink
Basophilic cells stain
Purple
Features of Posterior Pituitary
It contains non-myelinated axons which are the neurosecretory cells. The cell bodies of these cells are located in the hypothalamus.
The neurosecretory cells in pos pituitary secretes
Anti-Diuretic Hormone and Oxytocin
Acidophils are what type of class
Somatotrophs and Mammotrophs
Somatotrophs secrete
Somatotrophin aka Growth Hormone
Somatotrophs target
Liver
Adipose
Mammotrophs secrete
Prolactin
Mammotrophs target
Mamillary Bodies
Corticotrophs secrete
ACTH and MSH
Corticotrophs target
Adrenal Cortex and Melanocytes of Skin
Gonadotrophs secrete
FSH and LH
Gonadotrophs target
Ovaries and Testes
Pituitary Gland blood supply
Internal Carotid Artery branches Sup Hypophysical Artery and Inferior Hypophyseal Arteries
How does the hypothalamus communicate with the anterior pituitary?
Through releasing/inhibiting of hormones into Hypothalmo-Hypophysial Portal System
How does the hypothalamus communicate with the posterior pituitary?
Through neurosecretory cells via infundibulum
Venous drainage of pituitary gland
is through hypophysial veins into the cavernous sinus.
