anatomy Flashcards
What are the landmarks that surround the hypothalamus?
Hypothalamic sulcus
anterior sulcus
lamina terminalis
chismatic cistern
optic chiasm
interpeduncular cistern
mammillary body
midbrain mass intermedia
What does the 3rd ventricle seperate?
what is the floor of the hypothalmus?
walls of the hypothalmus
The floor of the hypothalamus includes the tuber cinereum and median eminence
What are the medial/lateral amd anterior/posterior of the hypothalmus?
medial/lateral- optic tracts
anterior-optic chiasm
posterior- posterior perforated substance
hypothalmus with nuclei and tracts?
What descends the hypothalmic grey?
the fornix (circled in green)
What doe sthe fornix connect?
a large, myelinated limbic fiber bundle that connects hippocampus to mammillary nucleus
optic tracts
What is a major landmark of the hypothalamus?
Optic Chiasm
What does the fornix divide the hypothalamus into?
medial zone
lateral zone
periventricular zone is adjacent to the 3rd ventricle
What is lateral to the lateral hypothalamus?
What does it include?
Lateral to lateral hypothalamus is the substantia innominata (part of the general area called the basal forebrain)
Area includes nucleus basalis of Meynert, a major player in cortical function
What passes rostrocaudally through the lateral hypothalamic zone?
Medial forebrain bundle
What is the hypothalamic nuclei subdivided into?
What lies between the 3rd ventricle and the fornix in the medial hypothalamic zone?
anterior (preoptic)
middle(tuberal)
posterior (mammillary)
Between 3rd ventricle & fornix column are 10 nuclei named for position or shape
What nuclei lie in the anterior zone?
5 nuclei: 3 anteriormost named in relation to the optic system
Preoptic nucleus
suprachiasmatic nucleus
supraoptic nucleus
anterior nucleus
paraventricular nucleus
What nuclei lie in the middle zone?
3 nuclei
Ventromedial
dorsomedial
arcuate
Which nuclei lie in the posterior zone?
2 nuclei
posterior
mammillary
Which tract ascends out of the mammillary nucleus?
mammillothalmic tract