hi:sphenoid_bone

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जतूक अस्थि (SPHENOID BONE )

स्फेनोइड हड्डी न्यूरोक्रेनियम की एक अयुग्मित हड्डी है। यह खोपड़ी के बीच में सामने की ओर, पश्चकपाल हड्डी के बेसिलर भाग के सामने स्थित होता है। स्फेनोइड हड्डी उन सात हड्डियों में से एक है जो अक्षकोटर बनाने के लिए मुखर होती हैं। इसका आकार कुछ हद तक तितली या चमगादड़ जैसा होता है जिसके पंख फैले होते हैं।

  • pterygoid notch पक्षाभ खांच
  • pterygoid fossa पक्षाभ खात
  • scaphoid fossa
  • pterygoid hamulus पक्षाभ
  • pterygoid canal
  • pterygospinous process पक्षाभ कंटक
  • sella turcica

Articulates with ethmoid bone anteriorly and basilar part of occipital bone posteriorly. It shows:

  • Jugum sphenoidale
  • Sulcus chiasmaticus
  • Tuberculum sellae
  • Sella turcica
  • Dorsum sellae
  • Clivus जतुक प्रवण
  • Rostrum of sphenoid
  • Sphenoidal conchae
  • Vaginal processes of medial pterygoid plate

Superior or cerebral surface

This forms the floor of the middle cranial fossa. It presents (starting from the front):

  • foramen rotundum
  • foramen ovale
  • Sphenoidal emissary foramen
  • foramen spinosum

Lateral surface

This is divided into (by infratemporal crest):

Upper or temporal surface Lower or infratemporal surface[4] Foramen pierce it:

Foramen ovale Foramen spinosum

Orbital surface

This forms the posterior wall of the orbit

These are two triangular wings projecting laterally from anterosuperior part of the body. Each consists of:

  • A base forming medial end of the wing.
  • Tip forming the lateral end of the wing.
  • Superior surface forming floor of anterior cranial fossa.
  • Inferior surface forming upper boundary of superior orbital fissure.
  • Posterior surface projects into the Sylvian point.
  • Medially, terminates in the anterior clinoid स्थानुक process
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  • hi/sphenoid_bone.txt
  • 2022/07/23 16:58
  • brahmantra