THRA.2 Flashcards
Give the main components of the topic: “Bones of the Lateral and Dorsal Side of the Neurocranium”
- Os temporale
- Os frontale
- Os parietale
- Os interparietale
- Os ethmoidale
- Os occipitale
- Os zygomaticum
- Os pterygoideum
- Os palatinum
- Os lacrimalis
(FITZ POPPLE)
Give the main constituents of os temporale
- Pars squamosa
- Pars petrosa
- Pars tympanica
Give the components of os temporale pars squamosa
- Crista temporalis
- Linea temporalis
- Sinus frontalis caudalis
- Processus nuchalis (Su)
Sinus frontalis caudalis
Excavates os temporale in Ru/Su
Processus nuchalis
Su Only
Attachment point of the the stylohyoid bone
Give the components of os temporale pars petrosa
- Crista partis petrosae (Eq/Ca)
- Fissura petrooccipitalis
- Foramen Stylomastoideum
- Processus styloideus (ØCa)
- Porus acusticus internus
- Meatus acusticus internus
- Apertura externa aqueductus vestibuli
- Apertura externa canaliculi cochleae
- Crista partis petrosae*
- Fissura petrooccipitalis*
Junction of the petrous and occipital bones
Conducts greater petrosal nerve and the chorda tympani
(Both ex CN-VII)
Foramen stylomastoideum
Between processus styloideus and processus mastoideus
Conducts the facial nerve (CN-VII) through canalis facialis
Processus styloideus
Rostroventral to the porus acusticus externus
Attachment of the stylohyoid bone in Eq/Ru
(Attachment in Ca is the processus mastoideus)
Porus acusticus internus et meatus acusticus internus
- Area nervi facialis* (CN-VII) (RostDors)
- Area cochleae* (ex CN-VIII) (RostVent)
- Foramen vestibulare dorsale* (ex CN-VIII) (CaudDors)
- Foramen vestibular ventrale* (exCN-VIII (Caud Vent)
Incisura semilunaris
Aka fovea ganglii nervi trigemini
Apertura externa aqueductis vestibuli
Dorsal slit on pars petrosa
Communication of the vestibular apparatus with the middle ear
Apertura externa canaliculi cochleae
Caudoventral slit on pars petrosa
Communication of the cochlea with the middle ear
Give the components of os temporale pars tympanica
- Porus acusticus externus
- Meatus acusticus externus
- Bulla tympanica
- Processus muscularis
- Fissura petrotympanica
Which structure(s) seperate pars tympanica from pars petrosa?
- Bulla tympanica
- Processus muscularis
- Fissura petrotympanica
Give the components of Os frontale
- Crista sagittalis externa
- Processus tentoricus
- Processus cornualis (Bo Only)
- Foramen supraorbitale (ØCa)
- Sinus frontalis
- Foramen ethmoidale
Foramen supraorbitale
ØCa
Becomes canalis supraorbitalis (Ru/Su)
Frontal artery, vein and nerve (ex CN-V1)
Sinus frontalis
Seperated by septum sagittalis into left and right sinuses
Single in Eq
Divided in Ca/Ru/Su
Foramen ethmoidale
Foramina in Ru
In equine, also includes the ethmoid bone
External ethmoidal artery
Ethmoidal vein and nerve (ex CN-V1)
Give the component(s) of os parietale et os interparietale
Crista sagittalis externa et processus tentoricus
Which species is os parietale et os interparietale not fused?
Fe
Give the component(s) of os ethmoidale
- Crista sagittalis interna*
- Lamina perpendicularis*
Give the main component(s) of os occipitale
- Pars squamosa et Partes laterales
- Facies nuchalis
Give the component(s) of os occipitale pars squamosa et partes laterales
- Protuberentia occipitalis interna
- Sinus frontalis caudalis
- Impressiones vermales
- Sulci sinus transversi