Head and Neck Anatomy Flashcards
Layers of scalp
SCALP
1) Skin
2) subCutaneous tissue
3) galea Aponeurotica
4) Loose areolar tissue
5) Pericranium
Arteries supplying the scalp are branches of the (2)
1) External carotid artery
2) Ophthalmic from internal carotid artery
Dangerous area of the scalp
Emissary veins
Layer of the scalp that causes scalp wounds to gape
Galea aponeurotica
How many bones make up the cranium
8
Bones of the cranium
1) Frontal
2) Right and left parietal
3) Occipital
4) Right and left temporal
5) Sphenoid
6) Ethmoid
How many facial bones are there
14
Facial bones
1) 2 nasal
2) 2 lacrimal
3) Vomer
4) 2 inferior concha
5) 2 maxillae
6) 2 palatine
7) 2 zygomatic
8) Mandible
Most common facial bone fractures
1) Nasal
2) Zygomatic
3) Mandible
Anterior fontanelles is aka
Bregma
Posterior fontanelle is aka
Lambda
T/F Mastoid process is present at birth
F
Mastoid develops during
First 2 years of life
Significance of absence of mastoid at birth
Forceps delivery may result in facial nerve injury
Weakest fossa of the skull base
Middle cranial fossa
Signs of middle cranial fossa fracture
1) Bleeding into mouth if with sphenoid involvement
2) Bleeding or CSF leak from ear
3) Facial and auditory nerve injury
Raccoon eyes signify fracture of
Frontal portion of skull base
Extreme tenderness and bruising over the area of the mastoid process of the skull (behind the ear)
Battle sign
Battle sign signify fracture of
Temporal bone
Cranial fossa fractured in the presence of a Battle sign
Posterior
A temporary improvement in a patientโs condition after a traumatic brain injury, after which the condition deteriorates
Lucid interval
Lucid interval is indicative of
Epidural hematoma
Intracranial hemorrhage, involved blood vessel/s: Epidural
Anterior division of middle meningeal artery
Intracranial hemorrhage, involved blood vessel/s: Subdural
Cerebral veins/Bridging/Emissary vessels
Intracranial hemorrhage, involved blood vessel/s: Subarachnoid hemorrhage
Aneurysm/angioma
Intracranial hemorrhage, involved blood vessel/s: Intraparenchymal
Lenticulostriate artery
Adult vs young child: Skull fracture likened to an eggshell
Adult
Adult vs young child: Skull fracture likened to a pingpong ball
Young child
Adult vs young child: Splintering of bone
Adult
Adult vs young child: Pond fracture
Young child
Signs of anterior cranial fossa fracture
1) Epistaxis
2) Rhinorrhea
3) Racoonโs eye
4) Exophthalmos
Signs of middle cranial fossa fracture
1) Rhinorrhea/Otorrhea
2) CN 3,4,6,7,8 damage
Signs of posterior cranial fossa fracture
1) Battle sign
2) CN 9,10,11 damage
Anterior arterial circulation of the brain is derived from
Internal carotid artery
Posterior arterial circulation of the brain is derived from
Vertebral artery
Branches of the internal carotid artery (6)
ICA > CAMPOS
1) Choroidal
2) ACA
3) MCA
4) Posterior communicating
5) Ophthalmic
6) Superior hypophyseal
Branches of vertebral artery
MAPP
1) Meningeal branches
2) Anterior spinal
3) Posterior spinal
4) Posterior inferior cerebellar
Adult vs young child: Splintering of bone
Adult
Adult vs young child: Pond fracture
Young child
Signs of anterior cranial fossa fracture
1) Epistaxis
2) Rhinorrhea
3) Racoonโs eye
4) Exophthalmos
Signs of middle cranial fossa fracture
1) Rhinorrhea/Otorrhea
2) CN 3,4,6,7,8 damage
Signs of posterior cranial fossa fracture
1) Battle sign
2) CN 9,10,11 damage
Anterior arterial circulation of the brain is derived from
Internal carotid artery
Posterior arterial circulation of the brain is derived from
Vertebral artery
Branches of the internal carotid artery (6)
CAMPOS
1) Choroidal
2) ACA
3) MCA
4) PCA
5) Ophthalmic
6) Superior hypophyseal
3 primary vesicles of developing brain
1) Forebrain/prosencephalon
2) Midbrain/mesencephalon
3) Hindbrain/rhombencephalon
5 secondary vesicles of developing brain
From prosencephalon 1) Telencephalon 2) Diencephalon From Mesencephalon 3) Mesencephalon From Rhombencephalon 4) Metencephalon 5) Myelencephalon
Adult derivative: Telencephalon
1) Cerebral hemispheres
2) Lateral ventricles
Adult derivative: Diencephalon
1) Thalamus
2) 3rd ventricle
Adult derivative: Mesencephalon
1) Midbrain
2) Aqueduct of Sylvius
Adult derivative: Metencephalon
1) Pons
2) Cerebellum
3) Upper part of 4th ventricle
Adult derivative: Myelencephalon
1) Medulla
2) Lower part of 4th ventricle
Myelination begins at
___ weeks
Myelination is almost completed at
___ years
Adult derivative of notochord
Nucleus pulpous of intervertebral disc
Branches of basilar artery
PPALS
1) Pontine branches
2) Anterior inferior cerebellar
3) Labyrinthine
4) PCA
5) Superior cerebellar
Venous drainage of brain
Dural venous sinuses
1) Superior and inferior sagittal sinus
2) Great vein of Galen
3) Straight sinus
4) Transverse sinus
5) Sigmoid sinus
Dural venous sinuses ultimately empty into
IJV
Neural plate is formed at
___ days
Neural groove and tube are formed at
___ days
Myelination begins at
___ weeks
Myelination is almost completed at
___ years
Failure of dorsal induction in the development of nervous system results in
1) Anencephaly
2) Encephalocele
3) Myelomeningocele
Disorder of ventral induction in development of nervous system results in
Facial malformations
Result of failure of neuropores to fuse at 4th week AOG
NTD