Section 1 Flashcards
of gill arches in humans?
6
What is girl arch # 1 and what does it form?
Mandibular arch
Forms Jaws
What is girl arch # 2 and what does it form?
Hyoid arch
Forms hyoid bone
Pharyngeal arch cartilage of upper jaw
Palatopterygoquadrate
From gill arch #1
Palatopterygoquadrate forms _?
Alisphenoid
*includes greater wing of sphenoid and spine of sphenoid
Pharyngeal arch cartilage of lower jaw
Meckel’s cartilage
Gill arch #1
Meckel’s cartilage forms__?
- Malleus
- Incus
- Enclosed remnants of meckel’s cart (in mandible)
Pharyngeal arch cartilage of hyoid cartilage
Reichert’s Cartilage
Gill arch #2
Reicherts cartilage forms__?
- Lesser cornu of hyoid
- stylohyoid ligament
- styloid process
- stapes
Pharyngeal arch cartilage of 3rd gill arch forms__?
- Body of hyoid
- Greater cornu of hyoid
Pharyngeal arch cartilage of gill arches 4-6 forms_?
- Thyroid cartilage
- Cricoid cartilage
What separates gill arches?
clefts and pouches
What is b/w gill arches 1 and 2?
Cleft: Ext. acoustic meatus
Pouch: Eustachian tube
What occurs to the pouches and clefts other than those b/w 1 + 2?
Clefts shut
Pouches-some form glands in neck:
- parathyroid
- Thymus
CN I name and travels through_
Olfactory N.
olfactory foramina
CN II name and travels through_
Optic N
optic canal
CN III travels through_
Superior orbital fissure
CN IV travels through_
Superior orbital fissure
CN V1 name and travels through_?
Opthalmic N
Superior orbital fissure
CN V2 name and travels through_?
Maxillary N
Foramen rotundum
CN V3 name and travels through_?
Mandibular N
Foramen Ovale
CN VI travels through_?
Superior orbital fissure
CN VII travels through_?
Internal acoustic meatus
CN VIII travels through_?
Internal acoustic meatus
CN IX travels through_?
Jugular foramen
CN X travels through_?
Jugular Foramen
CN XI travels through_?
Jugular foramen
CN XII travels through_?
Hypoglossal canal
What is the only bone in the skull pre-formed in cartilage?
Ethmoid
Special sensory nerves?
I, II, VIII
Primitive ventral roots?
III, IV, VI, XII
Primitive dorsal roots/
V, VII, IX, X, XI
CN I name, motor/ sensory, etc.
Olfactory N.
Special sensory
Special Somatic sensory innervation
Smell
CN II name, motor/ sensory, etc.
Optic N
Special sensory
Special Somatic sensory
Vision
CN III name, motor/ sensory, etc.
Oculomotor
Primitive ventral roots
- Voluntary motor to somites: most eye mm
- Parasympathetic motor: sphincter pupillae, ciliary mm
CN IV name, motor/ sensory, etc.
Trochlear N
Primitive ventral roots
Voluntary motor to somites: sup. oblique m
CN V name, motor/ sensory, etc.
Trigeminal N
Primitive dorsal root
- Voluntary motor to somitomeres: to arch I mm
- Somatic sensory: face, oral cavity, ant. 2/3 of tongue
CN VI name, motor/ sensory, etc.
Abducens N
Primitve ventral roots
Voluntary motor to somites: lateral rectus m
CN VII name, motor/ sensory, etc.
Facial N
Primitive dorsal roots
- Voluntary motor to somitomeres: arch II mm
- Parasympathetic motor: lacrimal, submandibular, sublingual glands
- Somatic sensory: skin by ear
- Visceral sensory: taste ant 2/3 of tongue
CN VIII name, motor/ sensory, etc.
Vestibulocochlear N
Special sensory
Sensory somatic: Hearing and balance
CN IX name, motor/ sensory, etc.
Glossopharyngeal N
Primitive dorsal roots
Voluntary motor to somitomeres: arch III mm
Parasymp motor: parotid gland
Somatic sensory: skin by ear
General Visceral sensory: Post 1/3 tongue
Special visceral sensory: taste post 1/3 tongue
CN X name, motor/ sensory, etc.
Vagus N
Primitive dorsal roots
Voluntary motor to somitomeres: arches IV-VI mm in pharynx, larynx; upper esophagus
Parasympathetic motor: gut from mid-esophagus to left colic flexure, heart, lungs
Somatic sensory: skin by ear
General visceral sensory: gut from pharynx to left colic flexure
Special visceral sensory: taste buds in pharynx
CN XI name, motor/ sensory, etc.
Accessory N
Primitive dorsal roots
Voluntary motor to somitomeres: arches IV-VI mm, sternocleidomastoid, trapezius
CN XII name, motor/ sensory, etc.
Hypoglossal N
Primitive ventral roots
Voluntary motor to somites: tongue mm
Layers of scalp
S-skin
C-CT hypodermis
A-aponeurosis (epicranial) aka galea aponeurotica
L-loose CT
P-pericranium or periosteum of skull
Layout of sensory/motor columns in spinal cord
Somatic sensory
Visceral sensory
Visceral motor
Somatic motor
Visceral motor symp neurons run from_?
T1-L2
Visceral motor parasymp neurons run from_?
S2-S4
What is an epidural hematoma?
When blood collects between skull and true/meningeal dura
What is a subdermal hematoma?
When blood collects between true/meningeal dura and arachnoid mater.
Where can you find CSF?
Subarachnoid space