slideshow Flashcards
Viscerocranium -
lower part, bones forming the face (maxillary and zygomatic)
2 nasal bones, 2 lacrimal bones, 2 zygomatic bones, maxilla (with piriform fossa), 2 inferior nasal conchae, unpaired vomer, palatine bone (roof of mouth)
Neurocranium -
upper part, bones around brain (cranial vault - cavity and calvaria - skull cap)
Frontal bone, 2 parietal bones, 2 temporal bones, 2 sphenoid bones (apex of orbit), ethmoid bone, occipital bone
Coronal sutures
frontal-parietal
Sagittal suture
parietal-parietal
Lambdoid suture
parietals-occipital looks like the Greek letter Lambda
Squamosal suture
temporal-parietal
Wormian bones lie
within the sutures (aka Inca bones)
The skull is much shorter in children and elongates in the viscerocranium. This is significant because the Eustacian tube is more ____ in children
horizontal
More horizontal Eustachian tube in children results in
more common ear infections
describe Neurocranium boney middle layer
Intermediate - cancellous bone (diploe)
Houses and protects RBC and red bone marrow
Diploic veins - run through ___ ____ (frontal diploic v., anterior and posterior temporal diploic v., occipital diploic v.) anastamose with each other. Drain the scalp and neurocranium - drains into dural venous sinuses (which is the superior sagittal sinus).
diploe bone
explain scalp vein drainage all the way through
Scalp v > diploic v > emissary v > superior sagittal sinus
The anterior fontanelle is known as the
Bregma (soft spot)
Oribt of skull borders
MS. ELFZ Feels A Mean Raw Labia Floor- Maxilla Apex- greater wing of Sphenoid bone Medial Wall- Ethoid bones (orbital plate) and Lacrimal bones Roof- Frontal Bone Lateral Wall- Zygomatic Bone
Lefort Fracture 1
Lower maxilla
Lefort Fracture 2
upper maxilla, under orbits
Lefort Fracture 3
though orbits
Pterion
Weak spot due to skull thickness
Meeting place for the frontal, parietal, temporal and sphenoid bones
Pterion Fracture
results in damage to the anterior branch of middle meningeal a. > epidural hematoma (fatal 15-20%)
Mandible articulates with skull at
TMJ (temporal mandibular joint)
Your mandible forms your lower jaw. What kind of joint does it create?
combination hinge and gliding joint (protrusion, retraction, elevation and depression
Inferior alveolar n. enters through
mandibular foramen
Inferior alveolar n. enters through mandibular foramen and provides ______. What does it exit out of, and what happens when it exits?
sensation to lower teeth and gums then exits mental foramen as the mental n.
What travels with the inferior alveolar n.?
The inferior alveolar a
SCALP stands for:
S- skin C- connective tissue (dense, vascular) A- aponeurosis (connects frontalis and occipitalis) L- loose connective tissue P- pericranium (periosteum)
Aponeurosis is known as the Galea Aponeurotic
Rostral
front of head
Caudal
back of head/tail
Cephalic
toward head
Ipsilateral
same side
Contralateral
opposite side
Where is the Corpora quadrigemina located? and what is it?
It’s located on the midbrain and it has 2 superior colliculi and 2 inferior colliculi
2 superior colliculi
vision reflex
2 inferior colliculi
audition reflex
Where is your Olive found
its a landmark on your ventral medulla
Your cerebellum has Tonsils on posterior lobe, what happens if the brain swells?
they can cause herniation, pressure on the brainstem so the person to not be able to breathe!
Cerebellum Function
coordinates muscular activity, mediates posture/equilibrium
Dysenergia
Cerebellum lesion-
muscles don’t work together
Ataxia
Cerebellum lesion-
unable to coordinate movements, jerky motion of trunk
Dysmetria
Cerebellum lesion
past pointing
Dysdiadochokinesia
can’t rapidly alternate
Secondary brain vesicles:
Telencephalon (cerebrum) Diencephalon (thalamus and hypothalamus) Mesencephalon (midbrain) Metencephalon (pons and cerebellum) Mylencephalon (medulla)
What are the tiers of the thalamus separated by? and
Explain the “Tiers” of the thalamus
Tiers are separated by internal medullary lamina:
Anterior tier - one nuclei
Medial tier - two nuclei
Lateral tier - lots of nuclei
Relay nuclei
take in sensation from incoming systems and relay to the cortex
These are specific to the sense. For example the lateral geniculate body relays vision and the ventral-posterior nucleus relays pain/temp.
Diffuse nuclei
non-specific, carry information from the ascending reticular formation to the relay nuclei
Association nuclei
receive info from other thalamic nuclei and send to association areas in cortex
Hypothalamus (and what does it technically innervate)
integrating center for ANS, innervates viscera and controls visceral function
Parasympathetic (rest and digest) vs. sympathetic (fight or flight)
What is the pituitary gland controlled by
the hypothalamus
3 parts of pituitary gland
Pars anterior -
Pars posterior -
Pars intermedia
What do all 3 parts of the pituitary gland do?
secrete hormones!
Pars anterior
Anterior - Teachers Are Failures Letting Students Pass
TSH-(Thyroid Stimulating Hormone- metabolism)
ACTH (AdrenoCorticoTropic Hormone- stress)
FSH (Follicle Stimulating Hormone- maturation of ovum + testes)
LH (Lutinizing Hormone- ovulation and testosterone production)
SGH (Growth hormone)
PRL (Prolactin- lactation)
Pars Posterior
OV
Octocin- facilitates labor
Vasopressin (ADH)- retain water
Pars Intermediate
MSH- melanocyte stimulating horomone- maintains normal skin tone