Defendant appeals her conviction for second degree murder on two grounds. First, defendant argues the trial court erred in its denial of a motion to suppress, based on an alleged wrongful police interrogation. Second, defendant assigns error to the trial court’s decision to limit the scope of testimony by defendant’s expert witness. We find no error, and affirm defendant’s conviction.
*301Evidence presented at the suppression hearing tended to show the following facts. On 21 February 1991, police officers responded to a phone call reporting a shooting at the home of defendant and her husband, Forrest Flowers. Upon arrival at defendant’s residence, Cleveland County Detective Jerry L. White observed defendant standing in the yard. Detective White entered the house and observed Forrest Flowers dead on the floor. Detective White also observed a hole in decedent’s chest, and a shotgun in the bedroom of the house. Detective White surmised the hole must have come from a large caliber weapon or shotgun blast.
Detective White then returned to the yard and spoke with defendant. Defendant told Detective White that she had been loading a shotgun across the room from decedent when an accidental discharge occurred. This discharge struck decedent, killing him. Defendant’s demeanor at the time of this investigatory inquiry is a matter of dispute. Detective White described defendant’s emotional state as “upset,” or “somewhat upset,” but not “hysterical or in tears.” Other witnesses at the scene of the shooting observed the defendant as upset, but rational.
Defendant was then transported to the Cleveland County Law Enforcement Center by Detective White. Once at the station, defendant was apprised of her Miranda rights. As defendant was read these rights, Detective White repeatedly paused and asked whether she understood those rights. Defendant responded by stating she understood her rights. Defendant then waived those rights and signed a written waiver. The waiver included the following statement:
I understand what my rights are. I am willing to make a statement and answer questions. I do not want a lawyer at this time. I understand and know what I am doing. No promise or threats have been made to me ....
The waiver was signed by defendant at 7:38 P.M. on 21 February 1991, and was witnessed by Detective Brian Hawkins.
After the waiver was signed and acknowledged, Detective White began questioning defendant. Shortly thereafter, Detective Raymond Hamrick arrived. With Detective Hamrick present, Detective White resumed the questioning of defendant. Detective White questioned the veracity of defendant’s version of events surrounding the shooting. Specifically, Detective White found defendant’s accidental discharge story inconsistent with the nature of the shotgun wound *302inflicted upon the decedent. Given the relatively small size of the entry wound, Detective White concluded the shotgun’s discharge must have come from close range, not across the room as defendant claimed at the shooting scene.
Defendant was asked by Detective White to explain this apparent anomaly, stating it “could not have happened the way you told me that it happened.” In response to Detective White’s question, and in the presence of Detective Hamrick, defendant retorted, “Well, okay, I shot him.” At this point, Detective White asked defendant if she would recapitulate her admission while being tape-recorded. Defendant agreed.
Defendant then repeated her story to Detective White while being tape-recorded. The tape recording took place at 8:30 p.m., 21 February 1991, and was witnessed by Detective Hamrick. In the transcript of the tape, the defendant affirms she was “advised of [her] constitutional rights” prior to making the recorded statement.
Defendant’s recorded statement elaborated upon her earlier admission of culpability. In her recorded statement, defendant admits shooting the decedent because she “had had all she could take.” Further, defendant explains how she selected a red shell, loaded the shell into the breech of the shotgun, and shot decedent from a distance of approximately two feet, while he was asleep on the couch. Defendant described the shooting as “a way out,” apparently meaning a way out of the marriage.
The next morning, 22 February 1991, at 10:02 A.M., defendant read and signed a transcript of her recorded statement, affirming the transcript to be her “entire statement.”
At trial, the defense theory was premised upon defendant’s purported inability to form the capacity necessary to knowingly and voluntarily waive her constitutional rights prior to interrogation. The evidence offered by defendant to support a defense based on incapacity centered on expert psychiatric testimony. The ostensible reason for the psychiatric testimony was to show that defendant “was impaired by an allergic reaction to prescription narcotics and post-traumatic stress disorder (PTSD) so as to render any responses to police interrogation unknowing and involuntary.” The State objected to the use of psychiatric testimony as substantive evidence of defendant’s lack of capacity, and the trial court sustained the objection. In ruling on *303the objection, the trial court allowed defendant’s use of psychiatric testimony only for the limited purpose of corroboration.
We note preemptively that defendant has not set out all of her assignments of error in her brief on appeal. As such, those assignments of error are deemed abandoned. State v. Ledford, 41 N.C. App. 213, 218, 254 S.E.2d 780, 782 (197.9); N.C.R. App. P. 28(b)(5) (1995). Defendant’s remaining assignments of error address the trial court’s failure to suppress defendant’s inculpatory statements, and the trial court’s limitations on defendant’s expert psychiatric testimony.
[1] Defendant maintains the trial court improperly allowed admission of her inculpatory statements, in derogation of the rules set forth in Miranda v. Arizona, 384 U.S. 436, 16 L.Ed.2d 694 (1966). The purpose of the Miranda holding is to ensure “the use of procedural safeguards effective to secure the [constitutional] privilege against self-incrimination.” Id. at 443, 16 L.Ed.2d at 706. Accordingly, defendant attempted to suppress her inculpatory statements, but that motion was denied by the trial court.
Defendant’s Miranda-based theory is twofold. Defendant argues “she was impaired by an allergic reaction to prescription narcotics and post-traumatic stress disorder (PTSD) so as to render any responses to police interrogation unknowing and involuntary.” Otherwise stated, defendant asserts she lacked capacity to waive her Miranda protections. Next, defendant argues Miranda warnings should have been given at each stage of the interrogation process, not just at the initial period of questioning. Because repeated warnings were not given, defendant asserts the original Miranda warnings became stale at the point the tape-recorded statement was made.
Appellate courts reviewing the voluntariness of a confession must apply a totality of the circumstances test. State v. Smith, 328 N.C. 99, 114, 400 S.E.2d 712, 720 (1991). Application of this totality test is based upon scrutiny of the “ ‘findings of fact made by the trial judge following a voir dire hearing on the voluntariness of a defendant’s confession [which are] conclusive on appeal if supported by competent evidence in the record.’ ” State v. Richardson, 316 N.C. 594, 598-99, 342 S.E.2d 823, 827 (1986) (quoting State v. Baker, 312 N.C. 34, 39, 320 S.E.2d 670, 674 (1984)). Conclusions of law flowing from the trial court’s findings are a proper matter for review. Smith, 328 N.C. at 114, 400 S.E.2d at 720.
*304In the instant case, the trial judge’s order denying defendant’s motion to suppress is replete with findings supported by competent evidence. Those findings justify a legal conclusion that defendant’s inculpatory statements were voluntary. Defendant’s arguments that she lacked capacity are belied by her actions indicative of rationality. For instance, the trial court found that “defendant was not hysterical, was not crying but was upset” during the period prior to questioning. Further, the trial court found defendant’s tape-recorded statements demonstrative of a person answering questions “in a clear manner generally, thoughtfully, responsively generally.” Defendant’s claim of incapacity, based on PTSD or an allergic reaction to drugs, is simply not borne out by the trial court’s findings or the record. Based on the enumerated examples herein, and others extant in the trial court’s findings, there was “plenary competent evidence” to support the conclusion that the confession was voluntary. State v. Corley, 310 N.C. 40, 52, 311 S.E.2d 540, 547 (1984). Defendant’s signed waiver of her rights was therefore in accord with Miranda.
[2] Defendant’s claim that the initial Miranda warnings were inadequate, or stale, with regard to defendant’s recorded statement (and the signing of the transcript therefrom) is ill-founded. The test for staleness is whether the Miranda warnings initially given were adequate to ensure defendant’s awareness of her rights during subsequent interrogations. Smith, 328 N.C. at 113, 400 S.E.2d at 719. A determination of adequacy is made by considering the totality of the circumstances. Id.
The record discloses that defendant was advised of her Miranda rights prior to any custodial interrogation. Defendant signed a waiver of those rights in close temporal proximity to the actual explanation of the warnings. The record shows the initial warnings, and defendant’s signing of the Miranda waiver, took place over a period of approximately eight minutes, from 7:31 RM. to 7:38 P.M. on 21 February 1991. The record is also clear that the taped questioning, and defendant’s statement arising therefrom, commenced at 8:30 P.M., 21 February 1991.
Prior to the substantive portion of defendant’s recorded statement, Detective White had the following tape-recorded colloquy with defendant:
Detective White: And did you understand all of those [Miranda] rights as I read them to you?
*305Defendant: Yes.
Detective White: And are you willing to answer questions and make a statement at this time, having these rights in mind?
Defendant: Yes.
The next morning, on 22 February 1991 at 10:02 A.M., defendant was presented with a transcription of her recorded statement. Defendant acknowledged the transcript, by affirming through signature the following annotation: “I, [defendant], have read the material contained herein and attest to the fact that it is my entire statement . . . .” The transcribed statement included the colloquy with Detective White above, explicitly referring to defendant’s Miranda rights. Simply put, defendant was reminded at least twice of the rights she now claims to lack memory of.
“Many courts have considered the question whether Miranda warnings must be repeated at subsequent interrogations when they have been properly given at the initial one.” State v. McZorn, 288 N.C. 417, 433, 219 S.E.2d 201, 212 (1975), vacated in nonrelevant part, 428 U.S. 904, 49 L.Ed.2d 1210 (1976). The McZom Court answered this question, holding that Miranda warnings retain efficacy, so long as
no inordinate time elapses between interrogations, the subject matter of the questioning remains the same, and there is no evidence that in the interval between the two interrogations anything occurred to dilute the first warning ....
McZorn, 288 N.C. at 433, 219 S.E.2d at 212.
The trial court found and concluded defendant “was advised of her rights ... at an appropriate time and in an appropriate manner . . . [and] [t]hat the rights of the defendant. . . were not violated by her detention, interrogation, or arrest[.]” This conclusion is well supported by the trial court’s findings that the tape-recorded statements were made in “a clear manner generally,” and were “thoughtful[]” and “responsive[] generally.” From these circumstances, it cannot be said that “defendant was so intellectually deficient or emotionally unstable that [s]he had forgotten [her] constitutional rights that had been fully explained to [her] a short time earlier.” McZorn, 288 N.C. at 435, 219 S.E.2d at 212. As such, the initial warnings given the instant defendant retained vitality throughout the questioning at issue here, i.e., the warnings were not stale.
*306 [3] Finally, defendant argues the trial court erred by limiting the testimony of her expert witness. The trial court refused to allow defendant’s expert witness to testify on the substantive issue of defendant’s capacity to waive her constitutional rights under Miranda, based on claims of PTSD and drug impairment. The trial court allowed the psychiatric testimony only to the extent necessary to corroborate defendant’s testimony.
The North Carolina Supreme Court made clear in State v. Daniels, 337 N.C. 243, 263, 446 S.E.2d 298, 311 (1994), that a witness “may not testify as to whether the defendant had the capacity to waive [her] rights [under Miranda]. ” Just as the rule is clear, so is the result here. Defendant’s brief argues the testimony of the “expert witnesses on PTSD and psychogenic shock . . . [was] for the purpose of showing that the defendant lacked the capacity to understandingly and voluntarily waive her rights and confess.” Defendant’s position ineluctably runs afoul of Daniels, and is without merit.
In summary, we conclude defendant had the capacity to waive her rights under Miranda; that such rights were properly explained to defendant by Detective White. We further hold that the Miranda warnings were not stale at the time of defendant’s recorded statements, or at the time the transcript of the recordings was signed by defendant. As well, the testimony of the defendant’s expert psychiatrist was properly limited by the trial court to corroborative purposes only.
No error.
Chief Judge ARNOLD and Judge GREENE concur.