LAB 9 QUESTIONS &
ANSWERS(GRADED A+)
what is the brachium region of the body? - ANSWERthe region of the body falling
between the glenohumeral and elbow joints.
the brachium contains ____ major muscle blocks or groups - ANSWER2
what are the 2 major muscle blocks or groups of the brachium? - ANSWERanterior
(flexor) compartment muscles and posterior (extensor) compartment muscles
anterior (flexor) compartment muscles (function and where do they lay on the
humeral shaft) - ANSWERwhich flex the elbow, lie anterior to the humeral shaft.
posterior (extensor) compartment muscles (function and where do they lay on the
humeral shaft) - ANSWERextend the elbow, lie posterior to the humeral shaft.
how are the posterior compartment and anterior compartment muscles separated
from one another? - ANSWERfascial septa
individual muscles in the anterior and posterior compartment muscles receive input
from the ________ vessels and nerves that pass through the compartments on their
way to the forearm - ANSWERsame
the cephalic vein drains into the - ANSWERaxillary vein
where does the basilic vein arise and ascend? - ANSWERthe ulnar side of the hand
and ascends on the medial side of the forearm and brachium, opposite the route of
the cephalic.
where does the basilic vein continue into? what does it eventually join and enter
into? - ANSWERThe basilic plunges into the medial intermuscular septum about
halfway up the brachium and joins the brachial veins (see later), eventually entering
the axillary vein.
what is the medial intermuscular septum? where is it located? what is it marked by? -
ANSWERa wall of fascia that lies between the anterior and posterior brachial
compartments.
on the medial side of the brachium
It is marked by a shallow depression running from elbow to axilla.
what is the medial intermuscular septum filled with? - ANSWERThis line is filled with
fat and many important nerves and blood vessels (see later) that pass from the axilla
into the limb. Since the fascia of the septum is continuous with the hypodermis, there
is no obvious boundary to warn you of the important structures within.
, similar to the medial intermuscular septum, what lies on the lateral side of the
brachium? what is different about this one? - ANSWERA similar lateral intermuscular
septum is present on the lateral side of the brachium, again separating the 2 brachial
compartments. However, this septum does not contain as many nerves and vessels
(limited to the radial nerve & the radial collateral artery; see later).
the depression on the front of the elbow is the - ANSWERcubital fossa
what are the cubital fossa sides formed by medially and laterally? - ANSWERThe
depression on the front of the elbow is the cubital fossa. Its sides are formed by the
brachioradialis muscle laterally and the bicipital aponeurosis medially
what fascia surrounds the entire forearm? - ANSWERantebrachial fascia
antebrachial fascia thickness compared to the other fascia surrounding brachium -
ANSWERmuch thicker
what is the longest vein of the upper limb? - ANSWERcephalic vein
where does the cephalic vein arise and ascend? - ANSWERIt arises on the radial
side of the hand and ascends on the lateral side of the forearm and brachium.
cephalic vein is the boundary between - ANSWERanterior deltoid and pectoralis
major
where does the median cubital vein lie? - ANSWERThis vein travels diagonally from
the cephalic vein of the forearm to the basilica vein of the arm
a shunt across the cubital fossa
what does the median cubital vein connect? what does this allow? - ANSWERa
shunt across the cubital fossa that connects the cephalic and basilic veins and
therefore allows blood from those 2 vessels to return via different routes as
necessary.
which vein is commonly used for drawing blood? - ANSWERmedian cubital vein
where does the median antebrachial vein ascend, what does it eventually join with? -
ANSWERascends in the ventral forearm from the wrist to the cubital fossa, where it
typically joins the median cubital vein.
what muscles lie within the anterior brachial compartment? what are these muscles
also called? - ANSWERalso called flexor block muscles because of their general
effect on the elbow
-biceps brachii, brachialis, and coracobrachialis
ANSWERS(GRADED A+)
what is the brachium region of the body? - ANSWERthe region of the body falling
between the glenohumeral and elbow joints.
the brachium contains ____ major muscle blocks or groups - ANSWER2
what are the 2 major muscle blocks or groups of the brachium? - ANSWERanterior
(flexor) compartment muscles and posterior (extensor) compartment muscles
anterior (flexor) compartment muscles (function and where do they lay on the
humeral shaft) - ANSWERwhich flex the elbow, lie anterior to the humeral shaft.
posterior (extensor) compartment muscles (function and where do they lay on the
humeral shaft) - ANSWERextend the elbow, lie posterior to the humeral shaft.
how are the posterior compartment and anterior compartment muscles separated
from one another? - ANSWERfascial septa
individual muscles in the anterior and posterior compartment muscles receive input
from the ________ vessels and nerves that pass through the compartments on their
way to the forearm - ANSWERsame
the cephalic vein drains into the - ANSWERaxillary vein
where does the basilic vein arise and ascend? - ANSWERthe ulnar side of the hand
and ascends on the medial side of the forearm and brachium, opposite the route of
the cephalic.
where does the basilic vein continue into? what does it eventually join and enter
into? - ANSWERThe basilic plunges into the medial intermuscular septum about
halfway up the brachium and joins the brachial veins (see later), eventually entering
the axillary vein.
what is the medial intermuscular septum? where is it located? what is it marked by? -
ANSWERa wall of fascia that lies between the anterior and posterior brachial
compartments.
on the medial side of the brachium
It is marked by a shallow depression running from elbow to axilla.
what is the medial intermuscular septum filled with? - ANSWERThis line is filled with
fat and many important nerves and blood vessels (see later) that pass from the axilla
into the limb. Since the fascia of the septum is continuous with the hypodermis, there
is no obvious boundary to warn you of the important structures within.
, similar to the medial intermuscular septum, what lies on the lateral side of the
brachium? what is different about this one? - ANSWERA similar lateral intermuscular
septum is present on the lateral side of the brachium, again separating the 2 brachial
compartments. However, this septum does not contain as many nerves and vessels
(limited to the radial nerve & the radial collateral artery; see later).
the depression on the front of the elbow is the - ANSWERcubital fossa
what are the cubital fossa sides formed by medially and laterally? - ANSWERThe
depression on the front of the elbow is the cubital fossa. Its sides are formed by the
brachioradialis muscle laterally and the bicipital aponeurosis medially
what fascia surrounds the entire forearm? - ANSWERantebrachial fascia
antebrachial fascia thickness compared to the other fascia surrounding brachium -
ANSWERmuch thicker
what is the longest vein of the upper limb? - ANSWERcephalic vein
where does the cephalic vein arise and ascend? - ANSWERIt arises on the radial
side of the hand and ascends on the lateral side of the forearm and brachium.
cephalic vein is the boundary between - ANSWERanterior deltoid and pectoralis
major
where does the median cubital vein lie? - ANSWERThis vein travels diagonally from
the cephalic vein of the forearm to the basilica vein of the arm
a shunt across the cubital fossa
what does the median cubital vein connect? what does this allow? - ANSWERa
shunt across the cubital fossa that connects the cephalic and basilic veins and
therefore allows blood from those 2 vessels to return via different routes as
necessary.
which vein is commonly used for drawing blood? - ANSWERmedian cubital vein
where does the median antebrachial vein ascend, what does it eventually join with? -
ANSWERascends in the ventral forearm from the wrist to the cubital fossa, where it
typically joins the median cubital vein.
what muscles lie within the anterior brachial compartment? what are these muscles
also called? - ANSWERalso called flexor block muscles because of their general
effect on the elbow
-biceps brachii, brachialis, and coracobrachialis
