N :nerve (femoral)
V : Vein (femoral)
E :empty space (femoral canal)
L : lacunar ligament
[think falling on the head & waiters tip]
To remember what the cranial nerves are, remember this colorful mnem:
oh oh oh, to touch and feel a girl's vagina and hymen
(olfactory - CN 1; optic - CN 2; oculomotor - CN 3; trochlear - CN 4; trigeminal - CN 5; abducens - CN 6; facial - CN 7; acoustic/vestibulocochlear - CN 8; glossopharyngeal - CN 9; vagus - CN 10; accessory - CN 11; hypoglossal - CN 12)
and to remember if they're innervated by a sensory or a motor pathway, or both, remember this:
Some say marry money but my brother says big brains matter more
(CNs 1, 2, 8 - sensory
CNs 3, 4, 6, 11, 12 - motor
rest are via both pathways)
Some Lovers Try Positions That They Can't Handle.
Skin Ectoderm ... will nounce it ECTADERM
E-Epidermis ( + Hair & Nails)/ Epithelial lining of lower anal canal
C-Cochlear duct & semi-Circular ducts
E-Enamel of teeth / lens of the Eye
RM-MaMMaRy glands (a gland with R & M in its name)
and note that the word ECTADERM has 2 Es so we attached 2 derivatives for each E
Neuroectoderm gives rise to:
Neuroglia( Astrocytes & oligodendrocytes only as microglia is a mesoderm and schwann cells r from the neural crest )
piNeurol (pineal) gland
+ R of the nueRo- is for Retina
Mesothelium (peritoneal, pleural, pericardial)/ Muscle (striated, smooth, cardiac) i.e. the heart is completed, so the Heart too comes from Mesoderm
Embryologic Spleen/ Soft tissue/ Serous linings/ Sarcoma/ Somite
Osseous tissue/ Outer layer of suprarenal gland (cortex)/ Ovaries
Dura/ Ducts of genitalia
Microglia/ Mesenchyme/ Male gonad
Parafollicular (C) cells/ Pigment Cells ( = Melanocytes )/ Pharyngeal arch Cartilage
Ganglia ( Autonomic & Sensory )
Arachnoid (and pia) / Aorticopulmonary septum
Medulla of the Adrenal/ Also Melnaocytes ( as u like use this or the above )
asculogenesis vs. angiogenesis
"Vascu is new. Angi is pre": Vasculogenesis is new vessels developing in situ from existing mesenchyme. Angiogenesis is vessels develop from sprouting off pre-existing arteries.
Weeks 2, 3, 4 of development: an event for each
Week Two: Bilaminar germ disc.
Week Three: Trilaminar germ disc.
Week Four: Four limbs appear.
Teratogenesis: when it occurs
TEratogenesis is most likely during organogenesis--between the: Third and Eighth weeks of gestation.
Lung development phases "Every Premature Child Takes Air":
Terminal sac period
Branchial arch giving rise to aorta
"Aor- from Four": Aorta is from fourth arch.
Woffian duct (mesonephric duct) derivatives.
· Female: Gartner's duct, cyst
"Little Embryo People Do Like Swallowing, Producing Gas": Lungs Esophagus Pancreas Duodenum (proximal) Liver Stomach Pancreas Gall bladder
The phrayngeal Pouches i created a formula for them ...
1A, 2P, 3 TIP, 4 SPUB
It might seem even more difficult but let me explain ...
1A .. 1 for the 1st letter of Alphabet which is A stands for Auditory ... So, 1st Pouch gives the epithelial lining of Auditory tube and middle ear cavity
2P ... 2 for the 2nd letter of the Alphabet which is the P ... for Palatine ... So, 2nd pouch gives the epithelial lining of cryPts of Palatine tonsil
3 TIP ... 3 then 3 letters TIP & start with T of Three ... these letters are the abbreviations given in kaplan for those derivatives and stands for Thymus and Inferior Parathyroid gland
4 SPUB ... 4 then 4 letters SPUB ... Also the abbreviations given in the notes for Superior Parathyroid gland and Ultimobranchial Body
The Arches ...
The Nerves ...
March 1975 i.e. 1975 = X, IX, VII, V and March to remember it is V3 ....
Arrange them .... Arch 1 gives V3, 2 gives VII, 3 gives IX and both 4 & 6 will have X
The Arteries ...
1st - part of MAXillary a. -------------- 1st arch is MAXimal
2nd- Stapedial a. & Hyoid a. ------- Second for Stapedial
3rd- Common Carotids and parts of internal Carotids ---- C is the 3rd letter of Alphabet
4th- on the lt. --> AORtic Arch and on the Rt.--> Rt. Subclavian ----
4th arch (4 limbs) = Systmeic & Also remember that AOR is from FOUR
6th- Pulmonary arteries and Ductus arteriosus ---- 6th arch= Pulmonary and Pulmonary - Systemic Shunt ( Ductus )
Muscles (Mesoderm) & Skeletal (Neural Crest) Derivatives ...
1st arch ...
Muscles => V3 innervates M.D. My T.V. i.e.
Muscles of mastication ( masseter, temporalis, pterygoid)
Digastric ( Anterior Belly)
Skeletal => I'M getting Skeletal like Silvester
Skeletal remind u of skeletal derivatives then
I for the 1 i.e. 1st arch and for Incus
M for Malleus/Maxilla/Mandible
2nd Arch ....
To remember the Muscles innervated by the CN VII ...
Imagine someone making the Facial Expression to say " PSS ... "
Facial Expression muscles
Posterior Belly of digastric
Stapedius ----> and it reminds u of the other skeletal derivative Stapes
Stylohyoid -----> and it reminds u of the the Hyoid ... but not all the Hyoid, we still in the 2nd level so choose the lesser that is above i.e. the Lesser Horn of the upper body of the Hyoid.( and when u get to the 3rd arch do the opposite )