Parietal bone

Parietal bone: Anatomy & FunctionKey facts about the anatomy of the parietal bone
~ 3 min

Let us examine the structure of the parietal bone (os parietale). It is one of the bones of the calvaria.

Parietal bone (os parietale)
Parietal bone (os parietale)

It has two surfaces:

  • external surface (facies externa)

    External surface (facies externa)
    External surface (facies externa)
  • internal surface (facies interna / cerebralis)

Internal surface (facies interna / cerebralis)
Internal surface (facies interna / cerebralis)

There are also four borders:

  • sagittal border (margo sagittalis)

    Sagittal border (margo sagittalis)
    Sagittal border (margo sagittalis)
  • frontal border (margo frontalis)

    Frontal border (margo frontalis)
    Frontal border (margo frontalis)
  • squamosal border (margo squamosus)

    Squamosal border (margo squamosus)
    Squamosal border (margo squamosus)
  • occipital border (margo occipitalis)

    Occipital border (margo occipitalis)
    Occipital border (margo occipitalis)

    These borders correspond to the four following angles:

  • frontal angle (angulus frontalis)

    Frontal angle (angulus frontalis)
    Frontal angle (angulus frontalis)
  • sphenoidal angle (angulus sphenoidalis)

    Sphenoidal angle (angulus sphenoidalis)
    Sphenoidal angle (angulus sphenoidalis)
  • occipital angle (angulus occipitalis)

    Occipital angle (angulus occipitalis)
    Occipital angle (angulus occipitalis)
  • mastoid angle (angulus mastoideus)

    Mastoid angle (angulus mastoideus)
    Mastoid angle (angulus mastoideus)

    We can distinguish the parietal tuber (tuber parietale) on the external surface of the bone.

    Parietal tuber (tuber parietale)
    Parietal tuber (tuber parietale)

    Underneath it are two lines:

  • superior temporal line (linea temporalis superior), with the temporal fascia attached to it

    Superior temporal line (linea temporalis superior)
    Superior temporal line (linea temporalis superior)
  • inferior temporal line (linea temporalis inferior), with the temporal muscle attached to it

Inferior temporal line (linea temporalis inferior)
Inferior temporal line (linea temporalis inferior)

On the cerebral surface of the bone, traces of the attachment of various cerebral and vascular structures are visible.

Along the superior border passes the groove for the superior sagittal sinus (sulcus sinus sagittalis superioris).

Superior sagittal sinus (sulcus sinus sagittalis superioris)
Superior sagittal sinus (sulcus sinus sagittalis superioris)

Along this groove, there are granular foveolae (foveolae granulares). These are traces of formations of the cranial arachnoid mater.

Granular foveolae (foveolae granulares)
Granular foveolae (foveolae granulares)

In the area of the mastoid angle lies the groove for the sigmoid sinus (sulcus sinus sigmoidei).

Groove for the sigmoid sinus (sulcus sinus sigmoidei)
Groove for the sigmoid sinus (sulcus sinus sigmoidei)

A large network of arterial grooves (sulci arteriosi), which are formed due to adjoining meningeal arteries, runs along the entire cerebral surface.

The impressions of the cerebral gyri (impressiones digitatae) can also be seen.

There is a parietal foramen (foramen parietale) at the sagittal border, through which the parietal emissary vein and a branch of the occipital artery pass.

Parietal foramen (foramen parietale)
Parietal foramen (foramen parietale)
Dictionary

Parietal Bone

parietal bone
os parietale
external surface
facies externa
internal surface
facies interna/cerebralis
sagittal border
margo sagittalis
frontal border
margo frontalis
squamosal border
margo squamosus
occipital border
margo occipitalis
frontal angle
angulus frontalis
sphenoidal angle
angulus sphenoidalis
occipital angle
angulus occipitalis
mastoid angle
angulus mastoideus
parietal tuber
tuber parietale
superior temporal line
linea temporalis superior
inferior temporal line
linea temporalis inferior
groove for superior sagittal sinus
sulcus sinus sagittalis superioris
granular foveolae
foveolae granulares
groove for sigmoid sinus
sulcus sinus sigmoidei
arterial grooves
sulci arteriosi
impressions of cerebral gyri
impressiones digitatae
parietal foramen
foramen parietale
Main screen of the Easy Anatomy app

Download Easy Anatomy and try it for free

  • Anatomical atlas
  • Interactive notes
  • Videos on Anatomy
  • Flashcard tests

Easy Anatomy

Learn anatomy effectively

3.2K

Функция доступна в приложении

Download the app