Anatomy Flashcards
Arteries in the leg
External iliac->femoral->popliteal->anterior tibial->dorsalis pedis
What is area covered by L3 dermatome
Anterior thigh
What is area covered by L4 dermatome
Over the knee and medial malleolus
What is area covered by L5 dermatome
Over dorsum of foot
Lateral calf and malleolus
What is area covered by S1 dermatome
Posterolateral area of foot
Lateral side of foot (pinky toe)
At what level does aorta bifurcate
L4
Which cranial nerves come out of the different brainstem parts
Midbrain- CN3 and 4
Pons- CN5-8
Medulla- CN9-12
Branches of CNV
V1= opthalmic
V2= maxillary
V3= mandibular
Function of CNV
Sensory to skin, sinuses and mucous membranes of face
CNV1 is corneal reflex
Motor control of muscles of mastication- masseter, temporalis
General sensation on anterior 2/3 tongue
Function of CN7
Motor- facial muscles supply
Sensory- anterior 2/3 taste on tongue
Parasympathetic supply of sublingual, submandibular and lacrimal glands
Difference in inflammation of vestibular neuronitis vs labyrinthitis
Vestibular neuronitis= inflammation of vestibular branch of CN8
Labyrinthitis= inflammation of complex of membranous labyrinth (semicircular rings complex)
Function of CN8
Splits into 2 branches at
- vestibular nerve= sensory information on balance
- cochlear= sensory information on hearing
Function of CN9
Sensory- touch and taste to posterior 1/3 of tongue
Afferent for gag reflex
Parasympathetic= parotid gland
Function of CN10
Sensory- heart, abdominal organs and larynx
Motor- muscles of pharynx and larynx
Parasympathetic supply to abdominal tract, heart and bronchi
Function of CN11
Motor to sternocleidomastoid and trapezius
Function of CN12
Motor- muscles of tongue
Nerve affected if tongue deviated to right
Right hypoglossal nerve
Efferent pathway in gag reflex
Vagus
If uvula is deviated to right where is lesion
Left vagus nerve
Corticospinal tract pathway
Motor
Cerebral cortex
Decussate in medulla
Synapse at spinal level and leave through ventral horn
What is carried in spinothalamic pathway
Temperature
Crude pressure
Pain
Where do spinothalamic vs dorsal column tracts decussate
Dorsal= medulla
Spinothalamic= 2 levels above level where enter dorsal horn
Causes of brown sequard
Trauma
Ischaemic
Infective- TB, abscess
MS
Presentation of brown sequard
Ipsilateral weakness
Ipsilateral vibration and proprioception loss
Contralateral pain and temp loss
What are is covered by S2 dermatome
Posterior thigh
What is covered by C5 dermatome
Lateral part of arm down to elbow