Lecture 9.2 Flashcards
Lumbar plexus are contributed to by ventral rami of
T12 + L1-4
The plexus of ventral rami L1-4 occur with _____ major
Psoas major
T12 and L1 go on to supply the ..
anterior abdominal wall
L2/3/4 go on to supply the nerve of the ____ -___
lower limb
From the lateral border of psoas major, 4 branches originate, what are they?
ilioinguinal and iliohypogastric nerves (L1)
Lateral cutaneous nerve of thigh (L2,3)
Femoral nerve L,2,3,4
The one anterior branch from Psoas major is
Genitofemoral nerve (L1,2)
The one medial branch from Psoas major is
obturator nerve (L2,3,4)
True or false
Psoas major attaches to the vertebral bodies (transverse process) and the vertebral discs
true
IlioHypogastric nerve is ___ than ilioInguinal nerve
higher (in alphabet as well)
going to anterior abdominal wall- above quadratus lumborum
The lateral femoral cuntaneous nerve of thigh tucks under the ____ _____ immediately adjacent to its attachment to ASIS
inguinal ligament
Then runs down the lateral thigh
Pins and Needles in pregnancy down the lateral side of the thigh can be caused by
The lateral cutanous nerve of thigh being trapped against the ASIS and the inguinal ligament
The femoral nerve is the ____ of the 4 branches from psoas
lowest
The femoral nerve passes under what going into the thigh
inguinal ligament
The Genitofemoral nerve branches into the .
genital branch
femoral branch - continues under the inguinal ligament
Obturator nerve is for the _____ muscles
adductor
derived from flexor musculature - therefore has anterior fibres
the Obturator nerve enters the addctor compartment through the ______ ___
obturator canal
The lumbosacral truck (leftover branches from L4,5) joints S1-4 on ______ (muscle) to form the ____ ___
The lumbosacral truck (leftover branches from L4,5) joints S1-4 on piriformus to form the
sacral plexus
The femoral nerve is motor to
Quads
Sartorius
Pectineus
The femoral nerve divides into its terminal branches just ____ to the ____ ______
distal to the inguinal ligament
motor, sensory and articular
The femoral nerve is sensory to the
anteromedial thigh and medial side of knee leg and anke
Anterior cutaneous branches
Saphenous nerve
Also braches to the joints they pass
What nerves come off the femoral nerve to supply skin on thigh (on medial side)
Medial and intermediate cutaneous nerves of thigh
What nerves come off the femoral nerve to supply skin on the medial side of the leg and foot?
the saphenous nerve
the pectineus has two actions and therefore ____ _____ ______ (same as adductor magnus)
two nerve supplies
once the obturator nerve is in the adductor compartment it splits…
into anterior and posterior branches
The skin of the medial side of the thigh, just above the knee is supplied by what nerve?
obturator nerve
Compressions of the obturator nerve (i.e from ovary) can be reffered to the …
The skin of the medial side of the thigh, just above the knee
The sciatic nerve contains anterior and posterior fibres of …
L4-5, S1-3
The sciatic nerve
emerges _____ piriformis
______ to hip joint
Passes ___ biceps femoris
emerges beneath piriformis
posteriorto hip joint
Passes under biceps femoris
The sciatic nerve divides at the apex of the _______ ____
popliteal fossa (most commonly)
Before it divides, the sciatic nerve supplies ONLY the ______ muscles
hamstring
The hamstring are supplied by the tibial component of Sciatic EXCEPT for short head of Biceps femoris which is by the ______ _______ component
common fibular component
The tibial nerve is the nerve of the ____ compartment of the leg and the ____ of the foot
The tibial nerve is the nerve of the posterior compartment of the leg and the sole of the foot
The tibial nerve is in _____ muscle territory so takes _____ division fibres of the ventral rami
The tibial nerve is in flexor muscle territory so takes anterior division fibres of the ventral rami
S4 is special - it’s all about the pelvic ___ and _______
S4 is special - all about the pelvic floor and perineum
not in the tibial and common fibula nerve
Tibial nerve is the “____” of Tom, Dick & Very Naughty Harr
Structures passing under the flexor retinaculum of the foot
Tom - Tibialis Posterior Dick - Flexor digitorum longus And -Posterior tibial artery Very -Posterior tibial vein Naughty - Tibial Nerve Harry -Flexor hallicus longus
Tibial nerve is _____to muscles of the posterior leg and sole of foot
Tibial nerve is motor to muscles of the posterior leg and sole of foot
Tibial nerve is sensory to…
posterolateral leg
lateral side of foot
sole of foot
The sural nerve can be seen as a branch from the tibial nerve, but gets a branch from the ______ _____ nerve as well
The sural nerve can be seen as a branch from the tibial nerve, but gets a branch from the common fibula nerve as well
The sural nerve is sensory to the ______ leg and _____ side of foot
The sural nerve is sensory to the posterolateral leg and lateral side of foot
true or False
The common fibular nerve contains L4,5 S1-3 posterior divisions
False
does not contain S3
- L4,5 S1,2
The common fibular nerve is adjacent and ____ to the biceps femoris (most lateral structure look at back of knee)
The common fibular nerve is adjacent and medial to the biceps femoris (most lateral structure look at back of knee)
The Common fibular nerve winds around the neck of the _____
and sinks in to _____ ____
fibula
and sinks in to fiblaris longus
The deep fibuar nerve is motor to the ____ compartment of leg and sensory to ….
The deep fibuar nerve is motor to the anterior compartment of leg and sensroy to 1st toe cleft
Superficial fibular nerve is motor to ______ compartment of leg and sensory to lateral leg and dorsum of foot
Superficial fibular nerve is motor to lateral compartment of leg and sensory to _____ leg and _____of foot
Kind of like musculo-cutaneous - gets its motor innveration done quickly (fibuaris longus & brevis) then goes to cutaneous innervation
The common fibular nerve itself has no _____ branches
no motor banches
The common fibular nerve emerges at the proximal fibula next to
tendon of biceps
Foot drop is associated with laceration of what nerve?
common fibula nerve
deep fibula nerve does anterior compartment
What is special about fibularis longus?
It is where common fibula n. splits
Large muscles in the gluteal region are supplied by the …
superior and inferior gluteal nerves
Posterior compartment f thigh and leg and sole of foot are supplied by ___ part of sciatic nerve (except….._
tibial part of sciatic nerve (except short head of biceps)
The femoral nerve innervates skin on the …
anterior and medial thigh and medial side of leg and foot (via saphenous nerve)
True or False
The obtrator doesn’t innervate skin
False
small area medially just above knee
The tibial part of the sciatic nerve innervates:
The posterior leg
Lateral side of ankle and foot
via the ____ branch
and Sole of foot
via the ____ branch
via the sural branch
sole of foot v
The lateral cutaneous nerve of thigh comes from the _____ plexus
lumbar plexus
lateral-lumbar
The posterior cutaneous nerve of thigh comes from the _____ plexus
sacral plexus
