Topography of Head (Internal) - King Salman International University PDF

Field of Medicine Medicine And Surgery Program 2- Topography of Head (Internal) Prof. Hany Shawky Date : 3 / 12 /2024 Prof. Usama Hussein  Lecture Objectives 1.Bony cranial cavity 2.Dural folds & sinuses 3.Arteries 4.Orbit 5.Ear ...

Field of Medicine Medicine And Surgery Program 2- Topography of Head (Internal) Prof. Hany Shawky Date : 3 / 12 /2024 Prof. Usama Hussein  Lecture Objectives 1.Bony cranial cavity 2.Dural folds & sinuses 3.Arteries 4.Orbit 5.Ear  2 cerebral hemispheres pituitary gland 2 cerebellar hemispheres spinal cord.midbrain.pons.medulla oblongata cap (vault)  Anterior cranial fossa o Roof of orbits & nose Middle cranial fossa o Sella turcica containing pituitary gland Posterior cranial fossa o Foramen magnum o Contains cerebellum & brainstem meninges dura mater arachnoid mater pia mater  outer layer = endosteum dura mater inner layer = dura proper Dural Sinus arachnoid mater brain pia mater Dural Folds  falx cerebri tentorium cerebelli falx cerebelli diaphragma sellae  falx cerebri tentorium cerebelli diaphragma sellae  emissary v. single sinuses:. Sup. sagittal sinus. Inf. sagittal sinus. Straight sinus Paired sinuses:. Transverse sinus. Cavernous sinus. Sigmoid sinus jugular F. internal jugular v. Dural Sinuses single sinuses:. Sup. sagittal sinus. Inf. sagittal sinus. Straight sinus Paired sinuses:. Cavernous sinus. Transverse sinus. Sigmoid sinus  ant. cerebral a. middle cerebral a. Circle of Willis 2 Internal carotid a. (through carotid canal) post. cerebral a. 2 Vertebral a. (through F. magnum) basilar a.  ORBIT Conical bony cavity - Contains 1. Eyeball 2. Muscles levator of upper eyelid a. 2 obliques R 2 4 recti R eye ball 3. Cranial nerves 2 v. R 3,4,6 = motor optic n. (2nd cranial) R ophthalmic of 5 = sensory 4. Vessels Ophthalmic a. of ICA 2 Ophthalmic veins  to cavernous sinus 5. Lacrimal apparatus: Lacrimal gland Lacrimal sac & nasolacrimal duct How many cranial nerves are in the orbit? Five 3 motor = 3 (oculomotor) – 4 (trochlear) - 6 (abducent) 2 sensory = 2 (optic) – ophthalmic (of trigeminal -5)  EAR 3 ossicles = Malleus - Incus - Stapes 3 semicircular canals 8th cranial n. vestibule External Cochlea auditory meatus Tympanic membrane Auricle (drum) Tympanic cavity Auditory tube EXTERNAL MIDDLE INNER